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What is the purpose of the IAC and what controls it? How does it work? I went to check my IAC today and cleaned it. Is the stem to move in and out freely or supposed to be hard to pull in and out? I noticed there was quite a lot of carbon around the stem, spring and pointer thing. Looks like the thing had been sticking for quite a while. How do I check to see if the thing is working right?
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sigpic1993 Pontiac Grand Prix SE, 3.4L DOHC 24 Valve V6 MFPI, 5 speed, completely stock, bucket on a budget! -
It's supposed to be hard to move. Do you know anything about electronics? If so then you know what a stepper motor is. If not:
It is controlled by your ECM, and basically acts like a controlled air leak. The ECM uses it to control the idle of your engine by opening (speed up) or closing (slow down) the leak.-60v6's 2nd Jon M.
91 Black Lumina Z34-5 speed
92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
94 Red Ford Ranger 2WD-5 speed
Originally posted by Jay Leno
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Originally posted by Ghettoracer View Post
Do yourself a favor man and buy a repair manual. The haynes manuals are decent and when you get learned up with it get the dealer manuals.1991 Pontiac Grand Prix GTP / 3.4 DOHCComment
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