Question about 2004 Cadillac Deville

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IDEL VERY ROUGH, IT RUNS GOOD BUT IDEL BAD - 2004 Cadillac Deville

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If the check engine light is on, then take the car to an autoparts store and have them scan the computer for any fault codes stored. The check engine light is to alert you that the computer has noted a fault in one of the car's systems. It sounds like a problem that could be caused by a faulty idle air control valve, but getting the codes will eliminate the need for speculation and should narrow down cause of the problem. Sorry for your trouble and I hope this helped. Best wishes.

Posted on Sep 24, 2009

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