Thread: Idle Problem. Please Help
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Old 01-01-2006, 05:50 PM   #13
pwpanas
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Quote:
Originally Posted by panicos
I have replaced the IACV a second hand one from a friend but no luck. Ive also checked the Air intake sensor & coolant and the ok also. Done many ecu resets but still no luck
Have you checked for boost/vacuum leaks? If a boost/vaccum leak exists around the intake plenum area, it can (inappropriately) function as a secondary IACV. If your Supra uses a maf, this additional unmetered air will cause an over-lean condition at idle.

Also note that some boost leaks, especially ones in the intercooler piping, can partially seal up when hot, due to expansion of the couplings, clamps or intercooler pipes.
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Last edited by pwpanas; 01-01-2006 at 05:52 PM.
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