Idle problems? ALL about IAC in one place!
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IAC has no memory for data storage and it re-homes itself on every startup. So it’s not affected by any long term missing voltage, as matter of fact it doesn’t have power anytime a car is parked with ignition switch off.
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I saw some videos and posts, they said they don't want to take out the throttle body and clean it because it is too complicated, I am wondering what the difficulty is for completely taking off the TB? (or what should I pay extra attention to if I want to take off it and install it back) Since I do want to take out it and clean it from front and back.
Not really correct for this IAC thread, so I’ll just add couple comments. Don’t use carb cleaned in the FIAV section of TB. When reinstalling, a common mistake is getting TB gasket reversed causing a vacuum leak.
So i took mine apart and blasted the area with carb cleaner. The original owner had it replaced about 2-3 years ago. The shop used this part:
Standard Motor Products AC99 Idle Air Control Valve https://a.co/d/eOQNvXY
Has anyone used this model, or should I source a better brand? I probed the rows side by side (1 to 2, 2 to 3, 4 to 5, 5 to 6) and got 40 ohms on the pairs. If i probed the ends of the rows, pins 1-3 and 4-6, i got 80 ohms
There was also a small snag in the o-ring but it doesn't look to be causing a leak
After cleaning, it idles slightly better, but my idle varies from day to day. Some days, i can barely tell the engine is running. Others, i just feel a minor shake in the wheel. On the worst days, it's like it's 10-15% lean and sounds like it's choking. I can feel it in the floorboard.
It's 4 12mm bolts holding it to the plenum and another 12mm bolt holding it behind/under the throttle cable that can be a pain to get to. There are 2 coolant lines as well. I can have the whole thing off in 30 minutes taking my time, but a seasoned mechanic could be in the 15-minute range, easy.
Standard Motor Products AC99 Idle Air Control Valve https://a.co/d/eOQNvXY
Has anyone used this model, or should I source a better brand? I probed the rows side by side (1 to 2, 2 to 3, 4 to 5, 5 to 6) and got 40 ohms on the pairs. If i probed the ends of the rows, pins 1-3 and 4-6, i got 80 ohms
There was also a small snag in the o-ring but it doesn't look to be causing a leak
After cleaning, it idles slightly better, but my idle varies from day to day. Some days, i can barely tell the engine is running. Others, i just feel a minor shake in the wheel. On the worst days, it's like it's 10-15% lean and sounds like it's choking. I can feel it in the floorboard.
Late response, but for anyone else that comes here to read this:
It's 4 12mm bolts holding it to the plenum and another 12mm bolt holding it behind/under the throttle cable that can be a pain to get to. There are 2 coolant lines as well. I can have the whole thing off in 30 minutes taking my time, but a seasoned mechanic could be in the 15-minute range, easy.
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