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Stalling when I let up on gas pedal
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dougl122
New User
Jan 6, 2009, 9:54 AM
Post #1 of 2
(1622 views)
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Stalling when I let up on gas pedal
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Hi, I've got a 1994 BUICK PARK AVENUE V6-3800 3.8L, and it's stalling on me pretty frequently. The car seems to idle and accelerate fine. However, if I use the gas pedal, then once I take my foot off the pedal, the engine stalls. If I let it up slowly and carefully, or if I'm just driving slower, sometimes it won't stall, but the rpms will drop low and the lights will dim for a second before they go back up.
I've checked my PCV valve, replaced my spark plugs, and used some wire dryer, fuel line cleaner and gasline antifreeze.
At this point I took it to a mechanic. They cleaned the throttle body and mass air flow sensor. Didn't help, so I brought it back. They replaced the IAC motor. Still didn't do anything.
Any suggestions? Thanks.
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Loren Champlain Sr
Veteran
/ Moderator
Jan 6, 2009, 2:18 PM
Post #2 of 2
(1616 views)
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Re: Stalling when I let up on gas pedal
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The symptoms definitely point towards an IAC problem. Wondering if it could be overfueling and the IAC can't compensate quickly enough? Did they scan the ECM to watch live data? Or, take a four gas reading?
Might try clearing KAM (keep alive memory) and take it for a drive to reset idle stratedgies. You can do this yourself. Disconnect the negative battery cable for at least 15 minutes, then reconnect. It may not run very good at first. Worth a try.
Loren
SW Washington
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