Question about 2001 Pontiac Montana

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Why would my 2002 pontiac run rough at idle as well as normal driving?

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If you are lucky, it's just the spark plugs. Try replacing them and see if that makes it better.

If that doesn't help, have the compression of the engine checked - it could be that some of the valves or valve seats are damaged.

Posted on Aug 06, 2010

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