Question about 1999 Buick Regal
Sounds like either a vacuum leak, or an idle air control valve. If you don't know much about cars, then you'll probably want to take it to a mechanic. If you look at all the black rubber and/or plastic tubes/hoses, you might be able to find a deteriorated, rubbed through, or broken tube/hose at the ends, or where they intersect other components and could be rubbing. I would definitely start with checking those out first. I hope this info helps!
Posted on Feb 16, 2015
Check the engine breather pipes ,they could be perished and sucking in air
Posted on Aug 01, 2010
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Posted on Jan 02, 2017
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