Question about 2000 Pontiac Grand Prix

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My Pontiac grand-am runs perfectly when warmed up but when it sits overnight and cools down the engine spins without any compression at all-eventually it will start after some chugs and barfs and misses-after it starts it runs beautifully with good power and no tailpipe smoke-it continues to run and start normally all day long but after it sits all night and cools down the problem reoccurs- ignition system good with new spark plugs-any ideas

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Goin thru same problem,will let u know what i find

Posted on Oct 13, 2010

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