After i put the intake on my car, the idle fluctuates from about 900 to 1300 rpms. What do you'll think it could be?

Sounds like you damaged your IAC, the little plug with the wires that goes into the intake tube. (Idle Air Control)

L33tJbody (Brandon Gathye) wrote:Sounds like you damaged your IAC, the little plug with the wires that goes into the intake tube. (Idle Air Control)

Thats not the IAC, thats the IAT, Intake Air Temperature sensor. The IAC is a little motor that sits in the throttle body and pulls a plunger in or out, and controls the idle.

I'd drive it around a little bit and see if it goes away, I had a high idle on my car when I did the HO manifold conversion, but it went away with some driving.





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After a while of driving, it does go down and idle sorta normal. But then ill be sitting at a stop light and it will do it again.

Well maybe the gas mileage and this are related. What else have you done to this poor little car ?




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A buddys car did that, but it was his mass air sensor, he changed it and it went away, but it started doing again after a few months





04 Cav 2.2 Ecotec

Check ur vacume line infront of the thottle body had the same problem- is ur engin light on? if the line is off it will idle strange rev up rev down

throttle position sensor



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yeah my 96 Z24 does it after the intake i put on.... some times my car makes a diesel car sound its wierd....