Symptoms of a faulty IAC...

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Apr 23, 2010 | 07:54 AM

#16

awdboosted

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From: NW Illinois

Quote:

Originally Posted by black95tt

I did pull the coolant lines and clean the TB, but was careful to not clean off the special coating (whatever it is). The IAC moves and everything checks out. The car idles fine and drives fine, it's just when I start it back up when it's hot. It idles high as hell for about 5 seconds and then settles in. Starting when cold is no problem.

If you don't have coolant lines connected it will do that. Unless you block off the FIA.

Apr 23, 2010 | 11:15 AM

#17

mifesto

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From: Princeton, NJ

i also hear disabling the EGR will also cause temporarily high idle on a cold motor

Apr 23, 2010 | 01:40 PM

#18

Evoryder

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From: ☼ Florida ☼

^ not if you lowere the desired idle tables

Nov 13, 2010 | 06:48 AM

#19

Liqquid

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From: Sag-Nasty, MI

Alright guys I've done all the testing listed here... when I remove the IAC and leave it plugged in to observe movement, when I turn the key ON.... it does nothing. when I turn the key back OFF.. it moved all the way out then back in.

?? isn' that the opposite of what it sould be doing?