Iac valve gasket leak. Has always had just a slight miss to it at idle.

Iac valve gasket leak And yes its right on top of the throttle body very easy The 2 hoses on the IAC are coolant lines. The cables could be sticking to cause a high idle and the idle screw may be out of adjustment. These valves are crucial in managing the engine’s idle speed, adjusting it higher or lower based on current operating conditions. 2 Poorly Installed or Leaky Gasket; 1. Could that have messed up the IAC valve? Finding the leak can be tricky as it can be the intake gasket on the bottom side if you are using a Chinese junk carb intake or you weren’t real careful putting the intake on. Very often is the IAA unit (pictured below) diagnosed faulty and replaced. Today I did the Scott Kilmer smoke test where my father in law blew cigar smoke into the vacuum line through the PCV hose leading to the throttle body. To replace In this video, you will learn 4 symptoms of a bad idle air control valve. Thi Before you check IAC, check for vacuum leaks on the intake manifold. This valve is sometimes called the auxiliary air valve. Since all i fooled with was the IAC (plus cleaning Does bad IACV gasket = boost/vacuum leak Factory 2. A faulty idle air control (IAC) valve can cause a number of problems with your vehicle: 1. Inspect the IAC valve EXPLAINING COMMON CAUSE OF ROUGH IDLE, LEAK IN AIR INTAKE FAULTS ON AUDI 2. com FREE DELIVERY possible on eligible purchases Idle Air Control IAC Restrictor Plate Fit for Ford Mustang V8 V6 GT 4. Attach the wiring The 3100 has lots of places for vacuum to leak. The heart of any vehicle is its engine, a complex and intricate machinery. Did not have a new one or could not make one. If you removed the air intake, ensure you reconnect the MAF sensor (if equipped). A defective IAC valve can result in the engine stalling while idling. Discard the gasket. Typically, idle control valves are motorized devices installed within the engine. But fear not! We’ll identify the Turns out, I failed to align the IACV gasket properly. New Check for vacuum leaks (most likely cause) Found out that it was a air intake manifold gasket that was leaking. The valve, commonly referred to as the IAC valve, allows the correct amount of air to bypass the throttle plate in order to maintain the More common boost leaks trouble spots are: vacuum lines that have blown off, intake gaskets, head gaskets, loose silicone couplers in the intake tract, etc. You can hear a hissing, and when I hit the gas, it whistles, and then the vacuum leak goes away. The Idle Air Control Valve or IAC valve is typically used in fuel injected car engines to control the engines idling speed, and prevents it from stalling. You will find new valve cover gaskets for $40 to $50, with the majority of the cost spent on labor. RIP OLDEERSLAYER 2000 Jimmy 4x4 4dr. If I pull the valve off and plug the two ports everything pressures up fine. Will come from there. I replaced IAC valve with Ford part, Buy Dorman 90102 Idle Air Valve Gaskets Compatible with Select Ford/Lincoln/Mercury Models, 2 Pack: Idle Air Control Valves - Amazon. Make sure engine is cold too there is coolant running underneath of the IAC valve. The idle air control valve, also known as the idle air control actuator, is an electronic component, which means that it receives its orders directly from the engine control unit OEM Honda part Prevents air from leaking past IACV Idle Air Control Valve (IACV) gasket Part number 16456-PND-A01 Description Vehicle Fitment About Honda This IACV gasket (part number 16456-PND-A01) is a genuine OEM Honda part. You may also notice fluctuating idle speed or a stalling engine on idle when your IAC valve is bad. TonyG. To install: Clean the IAC valve mounting surface on the throttle body of old gasket material. If there is a vacuum leak then it must be the intake gasket. After posting to many sites and troubleshooting, and checking for vac leaks, replacing iacv, adjusting idle etc with nothing working, I finally found the issue. suspect a vacuum leak. 9 posts · Directly below my EGR block off plate is a big thick metal pipe. Remove the gasket around the valve. They’re engineered to address unique characteristics of each application, plus they come with instructions and installation aids when needed. You can check the IAC by removing it and applying direct battery voltage to the valve to see if it is working right. I have been over Couldn't find any vacuum leaks, and all the gaskets are new, J's Racing Throttle body gasket that came with the J's Throttle body, Hondata intake manifold gasket, both been on about 2 weeks. An IAC is a controlled vacuum leak, a brake booster is a potential vacuum leak, and so is an EGR valve. Related Engine Code P0505. -Throttle Body and IACV gasket (optional)-EGR valve and tube gaskets-Spark plugs and wires (optional)-Permatex RTV gasket maker-2 Jugs of Toyota Long life coolant & distilled water This will remove spilled coolant residue and oil buildup from that leaky valve cover. Mercedes valve covers oil leak repaired Gasket valve leak leaking steps leaky handyman familyhandyman sealant silicone stuck Valve cover gasket oil leaking leak The IAC solenoid valve is merely held on by 2 Philips screws so that when energized it will magnetically change poles and the pintle will rotate open or closed depending on engine idle demand. I bought a new IAC and MAP sensor and I'm going to swap them out tomorrow. It cost me $6 from Exeter Subaru in NH in Irregular idle conditions may be the result of a dirty IACV sensor. HELP! all i did was change valve cover gasket. I decided to clean the IAC Valve in hopes of solving the issue. (got excited at this point) Cleaned the IACV as well as I could. The computer has detected a condition that might indicate an intake air system leak. Okay the truck idles at 2k rpm til it heats up then starts surging, obviously because of the fuel cutoff. 6 liter motor IAC valve electrical harness plug. HondaGM [QUOTED] likes of red at the intake manifold opening. With 100% IACV commanded my car with a ProEFI will rev to about 2300 RPM and keep constant. Have you checked your AEM tables and settings? When an idle air control valve fails it can cause the engine to idle erratically and even stall. That’s why we’ve partnered with JustAnswer, which connects you to certified mechanics around the globe, to I just had the same issue, after cleaning the IACV and the throttlebody I had the wondering idle. No clue what the failure rate of those are, but seems a lot of people have posted their costly stories trying to fix the issue. Part #: G31669 Line: MAE. IAC valve and gasket. When I changed it I noticed IACV was pretty dirty, but more concerning the gasket for the IACV failed and my engine was consuming coolant. That engine won't rely on the MAF for about 30 seconds after it starts cold when it switches to closed loop. The The IAC valve position is referred to as IAC counts. Even if it is something else, I still have to get the IAC set correctly to reinstall it. HINT: At the time of installation, please refer to the following items. The IACV adjusts the amount of air that bypasses the throttle plate The IAC valve will make a loud hiss when it starts up cold. 4. 0L) and i’m having problems with this thing idling at about 3000 rpms i’ve changed the upper intake gasket cause it was leaking, valve cover gaskets,TB gasket, IAC gasket, park plugs, wires, distributor cap and coil i’ve checked vacuum lines, vaccum leaks, still no change Idle Control Valve Replacement Help!!! Okay, Car won't start this morning, first I thought it was the Battery but isn't, finally got started but noticing low Idle, usually at 1300 rpm and comes down in few mins. I ponied up and got an OEM IAC, IAC rubber gasket, throttle body gasket, and a PCV valve and grommet. Be helpful if people would post what the codes mean because not even mechanics have the 1000s of codes memorized. so id go with CD. A prominent symptom of a bad IAC valve is an irregular Noticing a Check Engine Light (CEL) on your dash along with rough idling and stalling? A bad idle air control (IAC) valve may be the culprit. It’s a common problem because dealerships (and most tune-up shops) skip this step. In particular, I connected the spare IAC valve to its plug while the engine was running and confirmed that the solenoid is moving as engine speed changes. Once the tools are prepared, please consult the owner’s manual for the car and adhere to the instructions Just in case I missed something here, regarding your description, I'll throw this out there. It is used in the K20A/A2/A3 throttle bodies from 2002-2006 RSX DC5 & Civic Si EP3. How to Test an Idle Air Control Valve. But this isn’t a Honda but doesn’t hurt to JUMP TO TOPIC. The IAC has hoses to supply coolant to it which will cause the IAC to open/close depending on coolant temperature. 5 A faulty IAC can starve the engine of air at idle, resulting in stalling. The one I used when I rebuilt the engine (pic 1 #4,) exact replacement, and the one that seems to be the It's just those little rubber ring seals pressed into the intake manifold. The IACV may struggle to compensate for this extra air, leading to a range of issues, including stalling or high idle speed. If it's from the base gasket then replace that. A Dirty or Malfunctioning Idle Air Control Valve (IACV) Can Also Cause RPM Fluctuations. can anyone recommend a good store/website to get a IAC valve gasket for a 1998 Subaru Legacy Outback? having trouble finding one. Even though a leak is not too likely. You can feel it in the steering wheel. Confirmed that the IAC is completely closed which is most likely a vacuum leak. A vacuum leak in the intake system can cause the idle air control valve to work harder than necessary, leading to premature wear and failure. The procedure is to close IAC, then disconnect wire. I had mine off 90 degrees. No I didn't even take the IAC valve off while cleaning the throttle body. Upper intake gasket leak. Verified Purchase. The long and short of it - what you have is a vacuum leak problem. Disconnect connector from IAC valve Step 3. Either replace the gaskets or use silicone gasket sealant. The IAC valve is responsible for bypassing the throttle body and allowing See more For members who have performed the throttle body bypass mod, a bad IACV seal would manifest itself as a boost leak. And, in some cases, may even render it undrivable. The most common cause of a rev hang issue on an EA, EB, ED, EF, EL or AU Falcon is an air leak on the intake manifold. Reinstalled everything andSUCCESS!!!! Shop quoted $650 to replace the IACV. Idle Air Leaks. i was able to take apart the IAC Vavle completely and the sensor that's attached to it. Engine Won’t Start . Throttle Body Gasket (part number: 22271-88600) won't be needed, but up to you. does that mean the ECU is calling for 1500 rpm or does it mean the ECU always holds the IAC valve slightly open at all times, and additional vacuum leaks are the cause of the high idle. Bolts should be You need to do a 2-wire to 3-wire IACV conversion. There is a hose that goes to the rear valve cover that can cause some issues, the T-hose under the bracket for the throttle body splits and leaks, plus the awesome LIM gaskets. Green, red, or yellow could be the result of an antifreeze, power steering fluid, or transmission fluid leak. (8–12 Nm). Blowing smoke into the intake yielded no external leaks. I am thinking this vent is so the valve can move but a seal of some kind inside bit the big one. Like previously posted by Slumpert and rgk, the IACV has screws that just need to be good-n-tight. 0 out of 5 stars IAC valve gasket. I'm seeing prices ranging from $60 to $120 or so. Inspect the IAC valve (and engine) for vacuum leaks, cracks, corrosion, and other signs of physical damage. Now we must proceed to disassemble and the valve, we remove the IAC by removing the 2 Phillips screws that hold it, check if there are no leaks at the union of the 2 pieces, in that case make The function of the IACV a. 05-20-2015, 11:56 PM Does bad IACV gasket = boost/vacuum leak: iron_grenadier: Factory 2. New thermostat and gasket and fresh coolant. The AAC opening ratio can be observed on a Techtom MDM-100. Looks like I may not need one. Tighten to 8-11 Nm (71-97 in lb) . I still never have had an issue with Type 1 valve cover gaskets. Sometimes a weak idle air control motor will can cause engine problems without triggering a MIL (check engine) light. Use a carb cleaner to remove debris from the idle control valve, intake manifold, and throttle body. Bought my Ex with 68K miles on it. This runs in between the AAC (Auxilary Air Control Device – commonly referred to as the IACV- Idle Air Control Valve. If the poor idle quality remains the same when the IAC valve is disconnected, the IAC valve is almost certainly bad. Installed this in my 1998 The leak was more pronounced on a mild rev, so I gave it a few revs. 0L 3. 3 i head the head gaskets done and the motor wont stay running when you first start it and the idle is very low the ses lite came on the tech said it was code 0505 and 0325 iac valve and knock sensor Seems like my issue is the "or circuit" since i changed out the IAC valve which didn't help. That leads to higher current required to operate and that is what burns out the drivers in the ECU. 255,000 miles 2002 rcsb, 2. High Idle Speed: Conversely, an IAC Grab an All and pop the IAC Gasket out of the throttle body part way, and then grab it with your fingers and remove it the rest of the way (replace gasket) Notice that the gasket looks like a frog face :lol: Will the coolant hoses continue to leak out coolant if I don't plug them up, or will it only leak out whatever coolant is left in the Large engine vacuum leaks may include PCV valve/hoses, vacuum hoses, vacuum brake booster, check valve, or hoses, EGR valve stuck open, EGR gasket leak, or an intake manifold gasket leak. This Motorcraft IAC gasket is made of the exact same OE gasket material as your Mustang came with from the factory. While the IAC is off, note the state of the bottom. iac sensor 2001 xterra 3. Clean the IAC Valve with Carbon Cleaner and a The Volkswagen VR6 engine was shared across many models in the VW family but is best known in the VW GTI R32. replaced tbi gasket, cleaned aic valve located on tbi, and then replaced with salvage yard one, new fuel pump with "sock" fuel filter etc. Scan tool data indicating “0” IAC counts means the IAC valve is fully extended (shutting off idle airflow to the engine); and “255” IAC counts means the IAC valve is fully retracted, allowing as much air to enter the engine via the throttle bypass passage as possible. I'll replace the gasket at the TB but I was wondering if the leak at the EGR valve EGR valve= "exhaust return gas" is part of the emissions system so flooding the system with smoke I'm not sure is the answer, EGR valves have a spring and rubber diaphram inside so just pull it off and look inside at the condition, spray some TB cleaner inside the valve to remove any built up carbon and "plunge" it open and closed several times New idle air control valve; New gasket; or a messy oil leak can derail a project. As it gets closer to 1000 rpms, it starts to idle really rough for a few seconds then on it’s own it acts as if I gunned the engine and Finally got around to installing the new IAC about three weeks ago. Make sure that all electrical connections and vacuum hoses are securely attached. Remove gasket from throttle body Install in reverse order. Install and tighten the retaining screws to 71–106 inch lbs. Vacuum leaks can be caused by damaged or disconnected hoses, faulty gaskets, or cracks in the intake manifold. Check the IACV gasket. Lots of stuff to Disconnect the IAC valve. Cleaned it. removed from the intake manifold make sure that you do not lose the rubber gasket as you need this so that it does not leak after you re This is where the idle air control valve comes into play. (engine Hey man thanks for trying to help, It is 1zz manual, i've cleaned all the connectors with contact cleaner, replaced intake man. With this, I personally think I have two problems - depending on which valve is in place: 1. These numbers are what the computer "thinks" they need to There are several ways your vehicle could tell you its idle air control valve is in trouble. BTW I am only trying to run 16 to 17 psi. It is Seating And Sealing The Gasket It is important that the IACV be properly sealed. 2 at, 308,000miles 1967 C10. mechanics have suggested the IAC valve because during warm up, it starts out at about 1400-1500 rpms. Then signs of a bad IAC valve are the idle getting stuck in high, then maybe will drop after you rev it, but once it drops it doesn't get stuck in high again until you give it gas? Beduan 270pcs Compressor O Rings Kit 18 Sizes Car Air Conditioning AC Rubber O-Ring Gasket Reinstall the IAC valve, reconnect the IAC connector and reassemble all components removed to gain access to the IAC valve (air intake snorkel assembly, hoses, vacuum lines, etc. Best. IAC, replace the gaskets, and unhook the battery for a few minutes before doing anything else. CHECK Any leak between the MAF sensor, the electronic box bolted to the air filter box, and the throttle body will cause idle issues. IAC valve and donut gaskets along with The IAC valve has an electrical connector that connects it to the ECM, and a rubber gasket that seals it to the throttle body or intake manifold. You should also see smoke from the EGR valve and the throttlebody. If your vehicle frequently stalls at a stop or is in neutral, it’s time to inspect the IAC valve. If you think you have an air leak though, cleaning the AAC may not give you the results I had. This assures a clean seal between the valve and its seat. . Idle Air Control Valve is to adjust the idle based upon the amount of air entering the engine, then the computer reacts to this information by adjusting the cars rpm. if it tests good then replace the pcv valve. 0L When airflow blows through the IAC valve, the volume of air will be adjusted by the opened/closed ports inside the valve. Order Honda Civic Idle Air Control Valve Gasket online today. Watching this video will help you diagnose to see if it is time to replace your idl Everything i have read points to the IAC valve. Which I dont know if it is IAC valve? Vac leak? 13b NA fc vert 100k miles Share Sort by: Best. The first time I did the valve cover gaskets, I got the throttle body gasket on wrong, as well as forgetting to connect one of the coolant lines to the IAC valve. At idle, the throttle plate is completely closed because the gas pedal is not being pressed. Screw driver. You GET excess pressure in the UPPER engine and THE ISSUE leaks out of the valve cover gasket . Figure 6. Typically, your IAC valve is secured with two bolts. Also, check the IAC valve for carbon or debris Vacuum Leak or IAC issue? Thread starter SvtCobra0404; Start date Jul 1 I’ve used carb cleaner sprayed the lines and gaskets to check for a vacuum leak but cannot find one. Search for vacuum(/air?) leaks. The 2 bolts you take off get torqued to 2. Your symptoms sound more like IAC valve, clogged IAC passage, dirty throttle body, large vacuum leak, or stuck open EGR. Re-used the old gaskets. Feeling frustrated and let down I took it into somebody. I seem to be getting a vacuum leak from somewhere around the throttle body. My engine will stumble and die from lack of air if I close my IACV. I would start there. Step 6: Install the new valve. I installed a vacuum gauge and measured vacuum and it stays at 21. its position on the throttle body. you just don't want there to be a leak or the ECM (ECU I have a 1989 with a tbi 454 that has high idle due to frozen open iac valve. I wouldn't say it's a hard job, but it does require a lot of steps. 0TFSIStreamlight usb rechargeable pen light (affiliate link) https://amzn. But the IAC is so awkward to get at, I'd get the seals first, just to avoid the chance of a leak. This allowed coolant into the throttle body - every time I revved the engine, more coolant was dumped into my intake This guide is very detailed: it discusses cleaning and replacing the gaskets in the idle air control valve, throttle body, and intake manifold. 0 ohv, I also sprayed out several electrical connections(got the idea from the “even the Valve Cover Gasket Replacement - now with IAC Replacement! Well, I finally got around to replacing the valve cover gaskets on the 3. In the past, most cars had an idle air control valve (IAC) to manage idle speed by regulating the amount of air bypassing the throttle plate. 5000+ sounds like a lot. if unplugging the IAC valve drops the rpm from 1500 to 900. I noticed that smoke was coming out of Remove the (2) 8mm bolts securing the IAC valve in place. ("Suck it!") One question, however. Search under Unabomber’s name in this forum for details on cleaning the IACV. Open comment sort options. During idle, pull and cap each one looking for a reduction in idle (except the map sensor). Bolts securing IAC valve to throttle body. Can this be a bad idle air control valve or tune related? Reply. I was skeptical but tried it. Several parts and sensors regulate these substances, and the idle air control valve, or IAC valve, is one key player. I forget which one they specified but the price quote was several hundred (3-400 range) so I'm assuming its the aac However, there are still many IAC-equipped vehicles on the road, including your car. If it is there, but not when it's With the seat for the valve exposed, use the throttle body cleaner to clean the area you will attach the new valve to. In this video I will show you how to use Idle Air Control (IAC) position to identify a vacuum leak. 3. Each of these leaks could result or come from a leak in the intake manifold gasket seals. Something is leaking. The fuel system doesn’t need a bypass valve since modern The IAC valve is a small component that plays a critical role in your car’s engine performance. If there is even the tiniest of leaks in there it will cause the engine to idle lower, erratic or stall. If you don’t sort it out quickly, it can lead to costly car engine repairs. Remove the 2-wire IACV connector and get a 3-wire IACV connector from a junk yard. Then, it’s so i’ve been slowly fixing up an old conversion van i recently got (1993 ford E150 5. 5 Vacuum Leaks Associated With Throttle Body; 2 How To Fix the Issues Caused by Cleaning the Throttle Body?. removed from the intake manifold make sure that you do not lose the rubber gasket as you need this so that it does not leak after you re-install the IACV Not the AIR VALVE (confused at time as an IAC valve, which is in the middle of the intake manifold towards the engine side. Got it right when I matched up the bumps and impressions the throttle body made in the old gasket. What is an IAC it is an idle air compensator valve directly associated with the idle control on the 22RE. Top. This valve, with the purple plug on it, lets air into your intake manifold to regulate idle speed) and the front of the engine, where it needs to see a vacuum The real problem is with the hose collapsing. Capping off the left side valve cover port and blowing smoke into the right side valve cover, where the PCV valve goes quickly resulted in an intake manifold full of smoke, billowing out the throttle body I will remove this IAC and put the gasket on like i should have. If that Modular V10 (6. Three types of IAC valves are released for use (Figures 1, 2 and 3): l Hitachi (Figure 1) can be New IAC Valve Gasket (dealer only) Step 1: Disconnect battery. So, now our 20+ y/o vehicles have bad valves and valve seats, idle issues and “vacuum” problems. Seating And Sealing The Gasket It is important that the IACV be properly sealed. I've used propane to search for a vacuum leak. Saftey Eyewear Can be sunnies, glasses anything that protects your eyes. the pcv valve should be changed once a year even if it FainWan Idle Air Control Valve IACV IAC186 AC186 16022P2EA51 Compatible With Hon-da Civic CX DX EX HX LX GX 1996-2000 Ac-ura EL 1997-2000 1. If the code P0505 appeared soon after the battery has been replaced or disconnected. When the valve fails to maintain the correct idle speed, the engine may not receive sufficient air, causing it to stall unexpectedly. IAC valve location on 5. idle was sticking a bit sometimes so i decided to replace the iac valve and clean out the throttle body. These leaks can cause the engine to suck in more air than necessary, disrupting the air-fuel balance. Also buildup can clogg the IAC passages underneath. Here’s what you’ll need to do: Buy a New IAC Valve – Make sure you’re getting the right one for your vehicle. the grommet gasket is not needed unless yours is torn, the valve should come out easy when u pull on it. With the new IAC valve in place, my idle speed is high. One of the coolant line nipples was plugged solid. Some might have a paper gasket too which isn't really needed if the silicone gasket is intact, but if it's there it is another source of a leak and probably shouldn't be reused. WE ARE IN NO WAY AFFILIATED OR SPO In my search for a replacement IAC valve gasket, I also discovered 2 different upper intake plenum gaskets. 4. And while I was 3. 5) Poor Maintenance Poor-quality fuel or poor maintenance of the engine may cause an accumulation Idle Air Control Valve The Idle Air Control (IAC) valve is located on the air intake plenum. 0/5 sp. Usually, a bad or failing valve, will produce a few failure symptoms. Check the idle adjustment screw and throttle cables. If your old idle air control valve gasket is still stuck on the intake manifold, remove and discard. The idle air control valve is what provides air to the engine at idle when the throttle plate is fully closed. Go. RonD Official TRS AI. Before jumping to Cleaning iac valve and cold start on 04 wrx Once the valve is out, this is how the intake manifold remains, note how the old gasket remained apparently intact, but adhered to the manifold. 4L engine. Instructions said to take truck out and go over 40 mph to reset. Install gasket and IAC valve. If you own a late model Mercruiser engine in your boat, you're almost guaranteed to run into one of these common problems. The original gasket was so tightly mashed in that it was very difficult to clean out 100% from around the bolt areas. You can remove the valve, which is attached to the throttle body, and check yourself. Even a good IAC may surge if leakage of exh. 8 1986-2004 indicating that my air leak was at the AIC valve somewhere. If the gaskets or seals are worn, replace them to ensure a tight fit and prevent air leaks. sprayed some more brake cleaner and then sprayed some penetrant lube to make sure the valve would spin, and on the TB area. Could be a bad gasket but eliminate the obvious first I already tried plugging the vacuum hoses to check for leaks, but I did it with the IAC valve plugged in. Splice Yel/Blk to Yel/Blk and Blk/Blu to Blk/Blu in the cut harness to the 3-wire IACV connector. 6. PUENGSI IAC Idle Air Control Valve IACV 16022P8AA03 with Gasket IAC Valve Compatible With 3. The car dives but it does not rev low like it use to. Make sure you have the proper thickness gasket. Reattach the idle air control valve using the original screws or bolts, making sure they are So after all i've done recently to the truck, the real difference was the vacuum leaks (intake gasket, most lines, near the connectors, cut shorter, replaced), cleaning the contacts (including computer connectors) with electronic contact cleaner, the fuel pressure regulator - mileage went up about 20% up and now the IAC valve, mileage went Idle control valves, often called idle air control valves, are a principal throttle control component found in most modern vehicles. Symptoms of a Bad Idle Air Control Valve (IAC) How do you know your intake manifold gasket is causing rough or low idle? A worn intake manifold gasket will cause a vacuum leak and disrupt air and fuel mix A vacuum leak can be either a split gasket or a dry rotted hose or even a hose has come loose. used a tiny bristle brush on my rotory tool to really get off that carbon build up. 4 Cleaners Damage the Fuel Injectors; 1. ). A gasket is a good idea here, and FIPG wouldn't hurt, but be careful not to get it into the opening of the moving parts of the valve. Step 3 – Clean IAC valve The IAC valve in a car is a part that is connected to the throttle and helps to control airflow so that the automobile idles smoothly. That means that a vacuum leak in the mainfold of throttle body area shows itself up as an idle fluctuation rather than a stall as in the gen2s. Works like a thermostat. Check the FITV. Splice a new wire to the Orn wire in the 3-wire IACV connector and run it to pin B15 in the ECU connector. Smoke checked the engine and determined there are no vacuum leaks; Replaced the IAC valve with a brand new one, and verified that it is working; One of the vacuum lines, intake gaskets etc. I havnt performed it yet but my new engine hesitates and wont stay on a steady idle. Consult your vehicle information source for the recommended method of testing the IAC motor with the DVOM. It could be failing causing the ecu to open the IAC. Fel-Pro leak repair gaskets take the hassle out of leak repair. 1a. NOTE: Some newer vehicles don’t use an IAC but have an Electronic Throttle Body (ETB) System, which controls the throttle butterfly plate. For the past 6 months I've been having the p0505 issue where the car would jerk/bounce rpms around 1700 and idle high/hunting. Replace or Clean your IAC valve. With the Pathfinder, the problem is only on a couple years. Your RPMs will drop way down the car may feel like it’s about to stall. lol . These ports are sealed by a gasket to prevent air leaks. 1 Year Limited Warranty. Using a new gasket, position the IAC valve on the throttle body. Expect the valve cover gasket replacement cost to be between $90 and $400, depending on what type of vehicle you drive. If the valve is completely closed at idle it could mean that the idle screw is not adjusted correctly (too much air enters through it) or there is a vacuum leak (could be dirty TB’s not closing all the way). Remove IAC valve from throttle body Step 4. 1 Adjust the If it does, that can indicate a vacuum leak in the intake manifold gasket. Assuming you are using a fresh gasket, insert the gasket in the gasket grooves on the top of the IACV. 5. As far as i tested you can try to clean the IAC valve with some brake or carb cleaner, some times can do the job but normaly you have to get a new or a no vacuum leaks either that I know of- I'm sure I need a new one especially since I think the one on there may be the original. I checked fuel trims, valve shim clearances, replaced ECU, cleaned injectors + new seals, new plugs wires and even coils, ultrasonically cleaned the IACV to the point that it looks brand new, checked resistance and operation by supplying 12v, new OEM IACV gasket, replaced IACV with another used one - TWICE. Scrub the leaky valve cover area clean. Incorrect idle speed: An IAC valve that sticks in the closed position will create an idle speed that’s too low. This is because the vacuum makes the air flow into the head's intake runner if there is a gasket leak, but since the airflow is in the direction of the cylinder, no oil will be deposited inside the intake runner. It has an o-ring, not a gasket, that should be lubricated before I demonstrate Honda IAC valve cleaning & how to clean throttle body on Honda. She cranked up first time, but had a massive air leak. 4) Wear and Tear The coolant doesn't actually go through the IAC valve, it goes through the throttle body. Go to a shop that has a smoke machine and have them check the intake side for leaks. gasket, new spark plugs, new fuel filter, new IAC valve, and this happens only when driving and putting in neutral while car moves, when parked it stays at 900 RPM, looked for vacuum leaks but did not found any. Check the map sensor. While you may The idle air control valve (IAC) plays a pivotal role in ensuring your vehicle's engine operates smoothly at idle speed. I would be tempted to do a reset and see if any changes occurred. First, compare The ECM and the IAC valves should do this. How an Idle Air Control Valve Works. If the gasket is damaged, you can get a new one from the parts Find everything you need for cleaning the idle air control valve (IACV) here: the best products, why it's important, and how to do it. The tbi has been cleaned and everything replaced to include the TPS. 2000 Lightning, 2010- Raptor, 1992 GSXR 1100-8. 2L 3. to/3GxgW A leak in the vacuum system, like damaged gaskets or hoses, may disturb the vacuum pressure and lead to the poor performance of the IAC valve. 0L Turbo) Welcome to the North American Subaru Impreza Owners Club: Saturday June 24, 2023: Home: Forums: Images: WikiNASIOC: Products: Store: Modifications: Upgrade Garage : NASIOC > NASIOC on the manual it says to unplug the connector from the IAC and put a meter between the 2 contacts and u should get anywhere from 6-14 ohms if the IAC is good. It was a mess. While installing the replacement idle air control valve, align the bolt slots. The average intake manifold gasket replacement cost is between $80 and $400, depending on the car model and labor costs. Well, in this reading, we’ll explore what an idle air control valve is, its functions, its location, and how it works. Intake Manifold Gasket Replacement Cost. Symptoms - Poor idle, self reving at idle and poor performance at a constant rpm. If there is an idle speed or other IAC-related code stored, then there is probably a problem with the IAC valve, a vacuum leak, or a problem with the IAC control circuit. When the engine is cold, the IAC valve helps to get it started. Recently i noticed the idle getting worse and my mpg was dropping, from about 30mpg to 24ish. Bivouac, Feb 15, 2023 #4. How to fix - Clean your idle Air control valve. 6L SOHC With Gasket The gen3 is speed density. When removing the B20B intake manifold, there was a lot of residue left from the paper gasket. Figure 5. Figure 4. Depends if the OP had removed the IAC valve and damaged the gasket. I have a 505, idle air problem: The IAC valve seems OK, it reads 34 ohm on all circuits and clicks, vibrates/moves, when I start etc, like it supposed to I don't have an EGR valve any more (closed off with a plate), I've checked or replaced the other vacuum lines, so I think, I don't have a vaccum leak any more. Vacuum leaks and circuit problems can mimic a bad IAC valve. From everything I've read, it's the IAC. Replacing the IAC Valve. I removed the throttle body from the intake manifold and unscrewed the IAC valve and sprayed it down with brake cleaner. Make sure that the gasket is still good, and re-install the IAC. Save Share Green 1997 Cadillac Catera 102,000 miles, rebuilt IAC valve, leaky valve cover gaskets, some SERIOUSLY messed up headlights, and 3 cracked/broken sterio knobs. Sent from my SM Symptoms Of A Bad Idle Air Control Valve (IAC) The most common symptoms of a bad idle control valve are rough idle and a check engine light on your dashboard. Ensure the engine is cold. Be sure to collect the washers and gasket during removal. I changed the valve to no avail. Turn the ignition ON and leave on for several seconds then turn the ignition OFF to This valve allows air intake to the internal combustion chamber so that the engine continues to turn over, ready for more power. 8l) - Throttle body gasket leak? - Hey Everyone, Just wanted to ask a quick question to those who would know if this situation is normal or not. Especially if it has a black plastic thing on top. To replace the valve cover gasket, you must remove the valve cover as well. You said you manually closed the IACV and the engine started just fine. A vacuum leak can be caused by a broken intake manifold, intake manifold gasket, throttle body, EGR valve, and brake booster, or faulty vacuum hoses or lines. an irregular idle speed can also be due to other issues such as a vacuum leak or a dirty throttle The hoses and electrical connector should be straightforward, but the IAC looks like it's mounted on the bottom of the throttle body and may be impossible to unscrew without removing the throttle body which looks significantly more involved, and requires replacement of the throttle body gasket which I would also have to order. Your engine may not idle appropriately because of a vacuum leak. Okay guys. Cleaned that up like new. I also need to change the valve cover gasket and oil pan seal which I also read in my repair book can cause a vacuum leak. k. There are only 2 screws to mount this valve below the throttle body, not 4 bolts. 0 3. Slydog39 Discussion starter. It only has the two coolant hoses and the air 3. Honda Accord Idle Air Control Valve Gasket; Honda Civic Idle Air Control Valve Gasket; Ford F150 Idle Air Control Valve Gasket; Toyota Camry Idle Air Control Valve Gasket; Dodge Ram 1500 Idle Air Control Valve Gasket; Toyota Corolla Idle Air Control Valve Gasket; Ford Focus Idle Air Control Valve Gasket; Show Less I did both my valve cover gaskets and both upper and lower intake manifold gaskets on a 3800 Series II GM V6 engine. Clean IAC valve port (you'll need new a IAC valve O-ring) Check main engine harness near the EGR pipe, add heat insulation sleeve?? Leaky valve cover gasket? taylort232; Feb 11, 2025; Replies 11 Views 818. Founding Member. Once the equipment is ready, kindly go through the vehicle’s manual and follow through with the guidelines for cleaning the idle or transmission air control valve provided there. If the idle quality improves, there is likely a previously undiscovered air leak present. New gaskets were used while re-fitting the IAC valve and throttle body to ensure air tight installation. If cleaning didn’t do the trick, it might be time to replace the IAC valve. I usually take the valve out, soak the gunked part in seafoam or such, and using some cotton swabs to finish the job. It also shows how to disassemble the throttle cable (for those of you with a 2003 or Throttle body gasket leak is often hard to find. IAC valve location on 4. What I found was smoke coming from around the metal cap on the IAC valve. I even took it somewhere just to get a second opinion and they agreed and told me I needed a new one. 3) Vacuum Leaks. I removed about 85% of it, with the only remaining material being around the studs that hold the manifold on. Didn’t change. And keep an eye on that line, I check mine every oil change. Although rare, there are instances where a faulty IAC can throw off the air/fuel mixture enough to prevent the engine from starting. Check out free battery charging and engine diagnostic testing while you are in store. Apr 12, 2002 200 0 17 Owings Mills, MD. . Disconnect the Idle Air Control (IAC) electrical connector. The idle air control valve in the Toyota is an important component in controlling the Toyota's idle speed. Installing the New IACV: Install the new IACV in place, ensuring it Another source of vacuum leaks are where the FITV and IACV connect to the IM. It is important to understand that speed density engines The symptoms point to the iac valve, rough idle/ low idle and occasional rpm surging after starting in the morning. Same with any seal on the intake or a cracked vacuum line. Doesn't allow for proper vacuum or crank case ventilation. This mating surface Steps for Fixing a Bad IAC Valve on the 1997 to 2001 Lexus ES 300. You could put a little grease on them, tighten the IAC snugly, and call it good, if you don't want to wait. All these would be normal for smoke testing. While it was off I pulled the IAC valve. unclip airbox, unplug MAF Sensor, use pliers to slide clamps holding hoses to airbox down and slide off hoses, use flathead or 8mm socket to loosen clamp holding air tube to throttle Body, remove 10mm socket on side of airbox holding it down and remove air intake assembly. Some valves have a part using coolant to cool Proper combustion relies on a perfect mixture of air and fuel at all times, even when the engine is idling. I sprayed carb cleaner for vacuum leaks with no 2. Replies 48 Seems the gasket for the iacv after time can leak coolant which can also short out the iacv and burn the ECU. The Idle Air Control (IAC) valve is used to control engine idle speed and is operated by the Powertrain Control Module (PCM). To see smoke from the IAC is normal. *** Later model Miatas have the SINGLE IAC valve!! Thanks for the reply. Mar 28, 2009 If my IAC Valve is leaking a WOT it would leak boost into the power pipe. COMMON FAILURE SYMPTOMS OF A BAD VALVE. Yes, before changing it i disconnected the battery and reconnected it afterwards. And if the ECU detects that you’re going to idle, it opens the valve to allow air to enter so that the engine won’t stall. Feb 13, 2025. Turns out it was the throttlebody gasket between the intake manifold and the throttlebody. but no gasket. It is Vacuum Leaks. Joined Jun 2, 2012 Messages 25,364 Reaction score 8,426 Location Ensure a proper seal of your 1986-2004 Mustang idle air motor with this Motorcraft idle air control gasket! Whether replacing a leaking gasket or installing a new IAC it is always a best practice to install a new gasket. Save Share Reply Quote Like. Bloody awesome article mate. Vacuum leaks: A vacuum leak can cause your car’s engine to run lean, which can lead to a rough idle and other performance The idle control valve, also commonly referred to as the idle air control valve, is an engine management component that is found in one form or another on the majority of road going vehicles. Remove the bolts and the IAC valve. 5L 1997 1998 1999 2000 2001 2002 2003 Honda Accord Odyssey Pilot The function of the Idle Air Control Valve (IACV) is to adjust the idle based upon the amount of air entering the motor, then the ecu reacts to this information by adjusting the cars rpm. Color: Alright guys, so I got through my first plenum pull a couple weeks ago. Read Toms post again, Tom is right. If you end up needing to replace your IAC valve (they do fail on occasion), you can find the part numbers (and the links to purchase them on Amazon) below: 2005-2006 IAC Valve (Part # 4861552AC) 1997-2004 IAC Valve (Part # 4874373AB) There is no need at all to remove the throttle body to clean the IAC. BTLSHP. 1 Faulty or Dirty Throttle Sensor; 1. Those you really do need to adhere to the valve cover. 9l to check for vacuum leaks and smoke was leaking from the mating surface of the TB and intake manifold, as well as my EGR valve. It cost me $6 from Exeter Subaru in NH in Throttle body was cleaned using a throttle body cleaner whereas sea foam was used to clean the IAC valve. Problem I have seen is the line leaks and drips onto the IAC motor causing corrosion. It was an air leak in the throttlebody gasket. The valve takes information from several sensors. Next cause for high idle is a bad coolant temp sensor in the intake by the thermostat housing as idle speed is temp based. It and the mating surface on the IAC body should be clean. Replaced it and no change. Removal & Installation Disconnect the battery ground cable. 1. A quick trip to the The IAC valve in a car is a component that is attached to the car’s throttle, and a new idle air control valve gasket. 6L engine. 5 Signs Of A Bad Or Leaking Valve Cover Gasket. I was unable to remove the cylindrical internal "pencil" valve thing out of It seems like a faulty IAC (idle air control) valve/solenoid or a vacuum leak (hose possibly). Try re-bleeding the cooling system in case I messed up bleeding it the first time. This is done on a 2003 Hond Symptoms of a failing idle air control valve. Tested were the injector o-rings, throttle body, EGR, and manifold gaskets, the PCV, as well as all visible and accessible hoses. I did: Plenum Coolant Line Bypass, EGR Bypass w/o Removal, AIV delete, Valve Cover gaskets redone, new injectors. You would use something like air intake cleaner, and spray around the intake where there would be gaskets. Most likely you've got intake-leak between MAF and intake-valves. An idle air control valve controls the amount of air entering the intake manifold at engine idle. Any air that enters the manifold will be properly fueled. Fixed a lot of them . 1994LC; Jan 13, 2025; 2 3. This could be caused by a number of issues: Damaged intake manifold gasket or loose Here is what I have done. Free Same Day Store Pickup. Drying time is 3 hours depending 1987 - 1996 F150 & Larger F-Series Trucks - Leak at EGR during smoke test - I did a smoke test on my 4. Joined Apr 8, 2019 · 13 Posts #101 · Oct 20 Had a feeling I messed up the IAC Coincidentally (or not) a few months ago I swapped out my IAC valve. Jul 1, 2019 #2 S. 6 5. The IAC valve I purchased does not have a flange for this hose to connect to. IACV Gasket (part number: 22215-7A680) Replace if swollen and wont fit. Has always had just a slight miss to it at idle. With the original OEM IAC valve in place, my idle speed is fine. Remove the IAC valve and remove any carbon build-up that may be inside. Difficulty - Easy Time - Approximately 1hr Tools - 12mm socket, pliers, phillips head screwdriver, 2 small hose clamps (or small bolts to plug the coolant lines) ** If you don't know how to remove your intake Note that a vacuum leak can also result in abnormal idle speed, causing similar symptoms. 2. Retired ASE Master/L-1 Technician. This unique engine has some quirks that make I thought a sporadic or jumping idle was signs of a vacuum leak. When opening up throttle, this leak sucks in extra air that's not metered by MAF and results in lean mixtures. As you can see from the pictures above, an improper seal will allow coolant from the throttle body coolant lines to flow INTO your intake. This is the OEM rubber o ring gasket that is used on the 1989 to 1995 Toyota 22RE throttle bodies for the IAC valve. So, when the valve fails, it can cause all sorts of issues. After installing the new IACV I thought for sure the problem would disappear, but no the problem persisted. The computer uses this valve to control the idle when the throttle body butterfly plate is shut. You must have a vacuum leak. gas or air causes missing at Hello fellow Tacoma lovers, I was told after a diagnostic that my IAC valve was absolutely non responsive and I would need to replace it, along with a leaky PCV valve. With the air cleaner lid off, the vacuum leak through the iac is deafening. Takes a fraction of second for this extra air and lean mixture to hit O2-sensor in exhaust and ECU compensates with fuel-trim. I replaced the intake and exhaust manifold gaskets, the oil pan gasket, and the head cover and spark plug gaskets. However, this is a generic procedure Remove the gasket from the valve and note its position so that you can place the new gasket correctly. Install retaining screws. Also replaced the upper plenum with a new Dorman one. 6 Signs Of A Defective EGR Valve. On a warm start the switch happens almost instantly. My old truck use to that and I thought it was the IAC. I have done coils, plugs, fixed vacum leaks and manifold leaks (both exhaust and inlet) The car boosts up a bit better but around 5000rpm it hessitates like its hitting a limiter or something and on idle it jumps around and sometimes stalls. Refer to the disclaimer at the top of this guide. I think you can turn the pintle to Hello all, yesterday I attempted to clean my idle air control valve and replaced the throttle position sensor on my 1997 explorer 4. I don't have a vacuum leak, I've checked every line. But don’t worry, replacing it yourself is totally doable, and it’ll save you some serious cash. The Idle Air Control (IAC) Valve, a critical component of this machinery, regulates. Green, red, or yellow leaks under the vehicle. According to the experts/moderators on this site, a vacuum leak around the gasket can be the cause. I cleaned it up real good. The IAC valve is more or less a coolant temperature sender of sorts, that opens more as the coolant gets hotter. It appears to be a one way valve connected to two hoses, one of them goes to some other valve on the left and the hose on the right enters the IAC valve through a flange. Jump to Latest 101 - 106 of 106 Posts. Hi any help would be appreciated, i took out my idle air control valve to clean it, when i put it back i reused the gasket thinking it didn't look bad but after starting the car i realized coolant was coming out of my exhaust, i took the valve off again assuming the gasket was leaking into the throttle body, which was the case, i didn't have a replacement gasket so i reused the So far I've replaced the spark plug wires, distributor cap, set the base timing (but high idle prevents me from doing it properly), cleaned the throttle body, checked for vacuum leaks with a DIY smoke maker, and cleaned the little fitting that connects the coolant line to Highlighted in green is the component I took off. SvtCobra0404 C4 Tech/Performance - Can an IAC valve act as a vacuum leak - Can an IAC valve act as a vacuum leak if it is not working correctly? Pull it out and measure from the machined flange (where the gasket goes) and the end of the pintle. Check for vacuum leaks at these parts PCV Valve PCV hose Purge line Throttle body Intake manifold Brake booster hose If those all check ok I saw an oil leak near my dipstick and thought my valve cover gaskets The RPM still about 1500 to 1700 RPM when car is warmed up, when I put in drive it goes to +/- 1100 RPM, which I read still is a little high. Place a new Problem - Dirty Idle air control valve. It still idles high and threw a P0505 code. Most likely you can reuse the gaskets or o-rings. When changing to a big bore or removing for the cleaning of the IAC valve this gasket must be in good shape or you can Large engine vacuum leaks may include PCV valve/hoses, vacuum hoses, vacuum brake booster, check valve, or hoses, EGR valve stuck open, EGR gasket leak, or an intake manifold gasket leak. The video shows throttle body removal for cleaning. This means the upper to lower intake, the throttle body to intake, the air inlet tubing junctions, and all vacuum connections. Sometimes valve cover gaskets will grow as they saturate with oil, and the increased length will push them into the inside of the valve cover. Its purpose is to control and regulate the engine idle speed , increasing and decreasing it as necessary to keep up with operating conditions. Any tips on 1mz-fe v6 gasket oil leak plenum valve cover. I cleaned the TB and installed the new valve, new IAC and TB gaskets, replaced a hose that had dried and cracked after pulling it from the TB assembly, and pulled the battery cable for a few minutes before starting to reset the computer. Order Honda Accord Idle Air Control Valve Gasket online today. Depending on the Remove the two retaining screws, then remove the IAC valve and discard the old gasket. lbs. To install: Install a new gasket and position the IAC valve. An intake manifold gasket costs $30 to $100 and labor costs $50 to $300. Thanks for the suggestions! I'll start working down the However, the IACV has a tendency to leak externally, in several ways: 1)from the main mounting surface, the aluminum base mated to the intake manifold, held on by 4x M5 Philips-head bolts. TRS Technical Advisor. I will try with it unplugged. If the engine idles roughly, or not at all, disconnect the IAC valve’s electrical connector. 0L Turbo Powertrain (EJ Series Factory 2. On some if not all engines there is a silicone rubber gasket. The Rpms do not drop when releasing the throttle when in park or neutral. 80's, 1988 Cougar-5. Figure 3. It should measure 28 mm. Unscrew both bolts and your old IAC valve cautiously. :facepalm: It's easy to get the gasket mixed up. I was looking for the leak for about 10 minutes or so, long enough for the fans to kick on I gave it one more rev (no more than 3000 rpms), and BANG CLACK, the engine shuts off! Totally locked up! Turns out, I failed to align the IACV gasket properly. I would still recommend replacing the cover gasket. The intake manifold gasket itself is often quite cheap, but most of the replacement cost comes from labor costs. 3 Getting the Cleaner on Electrical Parts; 1. These ports are sealed Irregular Idle Speed. Valve Cover Gasket Replacement Cost. This valve counters the strain on the engine that occurs when the air conditioning is turned on or when lights are activated. Happy Don't know the answer to your question, but I had no problem re-using gaskets on other cars for cleaning IAC valves. Way Down on power also. Remove the IAC Valve. a. T. This is probably one of the easiest and The idle air control valve (or IAC) helps to regulate the amount of stress placed on the engine, ensuring it is not overworked. I initially thought it was a suspect IACV>Balance Tube hose, so I got a new one on. Original OEM IAC valve - whistle on first startup after driving a mile or so, idle speed ok. Know, however, that these symptoms are quite general and are not 100% accurate For members who have performed the throttle body bypass mod, a bad IACV seal would manifest itself as a boost leak. If your engine has an unsteady idle or you've encountered the P0505 - Idle Control System Malfunction trouble code on your OBD-II scanner, you may be dealing with a faulty idle air control (IAC) valve. It didnt look too bad, the rod inside was covered in gunk. The idle/vacuum leak diagnosis comes from the bad valves/valve seats, allowing pressure leaks across all the cylinders. Thanks! Step 2. star screwdriver, and a fresh idle air control valve gasket will also be needed for the cleaning. Carefully take out the old valve. Multi-colored leaks under a vehicle could be a sign of a leaking intake manifold. 8) If nothing has worked you should test your TPS. The Type 4 valve cover gaskets have gotten totally extremely thin and cheap. Found that the "pencil" valve thing inside was indeed binding. surge919 · Registered. 2 strong suggested mechanics states ICV now, my questions/help needs, I got the parts from Honda Dealerdoes anybody have a pics suggestions on how to The most common symptoms of a vacuum leak include an illuminated check engine light, rough running, stalling, increased engine idle RPM, and a hissing noise from the engine. S. 1 6 of 6 Go to page. Aside from no longer having leaky valve covers, my engine idle speed is a perfect 750rpm. I would also check the intake manifold gasket, spark plugs and wires. Project: Catera should start this spring Shop for the best Fuel Injection Idle Air Control Valve Gasket for your vehicle, and you can place your order online and pick up for free at your local O'Reilly Auto Parts. Just got a message from JJ stating it is normal for the IAC to leak during a smoke test. It my IAC bad and causing this massive leak? It is leaking if I even blow into it from either port with the other blocked off. I changed the IACV with a brand new OEM IACV as this is a common problem with the K20A2. Removal of the IAC is When airflow blows through the IAC valve, the volume of air will be adjusted by the opened/closed ports inside the valve. Idle Air Control Valve (IACV) Removal, Installation, Cleaning Difficulty: Easy Time Required: Actual work is 30 minutes. Next, you can have a bad IAC (idle air If the engine is old enough to leak at the valve cover gaskets, it's also old enough to have vacuum leaks after the MAF. 1 Why Do Problems Occur After Cleaning the Throttle Body?. You might also measure the voltage on the connector when it's unplugged from the IAC unit. 1ft. Reviewed in the United States on February 28, 2020. Engine Stalling Remove the hoses and clamps connected to the IAC valve. R32 Skyline GTR RB26DETT Turbo Kenjutsu AAC / IAC Idle Control Valve Gasket | eBay The first time I bought, I was shocked at how flimsy the gasket is and realistically, I could have just used gasket material and used the AAC as a stencil. The part number for the IACV gasket is 22659AA120. The IACV moved freely and no leaks once I used an original Lexus gasket. If it's not that, I'm stumped. MAHLE Molded Rubber IAC Valve Gasket - G31669. ibpedlr zfqtbb brok yteaxgl wuvqy zmuhq kjbkp isktk crz utbfxdnv jxjvhpu wvs aqu quasnp lhrnxf