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Cars idling weird after car is warmed up.

Old 29-Mar-2007, 08:18 AM
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Cars idling weird after car is warmed up.

Hey guys, i notice when the cars warmed up and has been on the road the idle goes up and down between 700-1200 rpm. IF i let it sit long enough it will idle normal, any ideas?? Thanks
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Old 29-Mar-2007, 10:37 AM
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Possible vacume leak, possible dirty EACV/FITV.
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Old 29-Mar-2007, 11:08 AM
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mine was like that too
it was due to a vacume leak for mine
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Old 29-Mar-2007, 11:39 AM
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Thanks, i'll have to take a look.
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Old 29-Mar-2007, 02:52 PM
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thats a pretty good indication of the iacv needs cleaning or replacing assuming there are no vacuum leaks, aswell check the Throttle position sensor , in my case replacing the iacv did nothing it was the tps
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Old 29-Mar-2007, 03:52 PM
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if you have a vac/boost gauge, it should be easy to tell if you got a vacuum leak.
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Old 29-Mar-2007, 05:28 PM
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i have a boost gauge, how do i tell, looks like im reading ok. When we were tuning we were getting a TPS code, but we found that there was something wrong with the harness so we replaced it and all the codes are gone. I'll have to check for vacuum leaks, we also turned up the idle a little, not sure if that affects anything, but can't imagine it would.
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Old 29-Mar-2007, 07:54 PM
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if the gauge 'hunts' around rather than being steady, you likely have a leak.
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Old 30-Mar-2007, 12:00 PM
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Originally posted by bbarbulo
if the gauge 'hunts' around rather than being steady, you likely have a leak.
Thanks man.
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Old 20-May-2007, 12:03 AM
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Well i finally figured it out. i ended up turning the idle down and presto, she's back to normal.
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Old 20-May-2007, 10:18 AM
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thats why I tell people NOT to mess around with the idle screw..

glad you found it
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