IAC trouble or something else?


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May 29, 2001
I have always had good IAC counts, 25 or so hot at idle. Lately my idle will hunt up and down and the IAC counts are in the 120-150 range. They rest back at 120 according to Directscan when the car is off.
My tps is the same as always, and no vacuum leak that I know of.
I also have to crack the throttle on the car when it is warm and it will start right away.
Is it possible the IAC is stuck closed? When I removed it it seemed to be fairly clean with the pintle all the way out.
The only thing I have changed lately were the head gasket and the addition of headers....:confused: