10-23-2008, 07:28 PM
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AF Enthusiast
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Join Date: May 2005
Posts: 690
Thanks: 0
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Re: 2002 Envoy problems with stalling and high idle
Vacuum leak (unless a TSB exists)
Quote:
Loping idle is vacuum leak. 30 year old lawnmower, or a new car on the lot. If it sucks air where it ain't supposed to, it lopes.
Brick on pedal, block TB arm, anything to get a STEADY idle. 1200rpms or so... Feed starting fluid spray, A LITTLE AT A TIME, EVERYWHERE. Rev increase is the leak.
In a tough spot to pinpoint? Light a book of matches, blow it out while the heads are burnin', and feed the smoke to the leak.
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