Question about Cars & Trucks
Did you test those parts before you replaced them ?
Its probably a vac leak somewhere, or the throttle plate is sticking open.
Posted on Jul 16, 2013
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Posted on Jan 02, 2017
SOURCE: 1997 buick lasabre custom
It sounds like you have a vacuum leak or intake gaskets leaking. Try this. Start the engine and let it reach the idle it want to go to. Get you a can of Brake Clean and spray it around the intake manifold (it on the top center of the engine, you may have to removed a plastic cover) If the engine idle changes up or down then the intake gaskets are leaking hence your vacuum leak. I hope this will help you.
Posted on Jan 04, 2009
Spray the intake with carb cleaner to find the vacuum leak. Check where the EGR mounts and the throttle body gasket sense you had both off.
Posted on May 10, 2009
could be the coil pack playing up ,or the computer not working properly ,very difficult to diagnose without the right software so i would suggest taking it to a dealer and see what they say
Posted on Jun 22, 2009
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