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Warm idle hunting
Hi all
I have a 2001 carrera 4. My car has a hunting idle(sits at 800 for a few seconds and then drops to maybe 720 for a moment and then goes back up) only when it’s fully warm(at 190 degrees). Anything below that and the idle is perfectly steady.
My car also fires up pretty unsteadily when fully warmed up.
Ive rules out: MAF, Throttle(clean), and vacuum leaks(idles too well when cold)
I suspect: O2 sensors and emissions related components(I’m wondering if there is emissions valves that kick in once up to temp)
Not sure: AOS- it would cause equivalent warm and cold issues if it were failing I think
Any input? Thanks!
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