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Idiling poor - C-Class Mercedes-Benz Cars & Trucks

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Hi

Thanks for using FixYa. A bad 02 sensor would put the fuel injection system into "limp home" mechanical mode. It may run very rich and may result over fueling of some wet plugs. Also check the spark plugs. If still the problem persists, then you need to change the 02 sensor. Poor idle could also be a symptom of a vacuum leak or possibly bad compression in one or more of the cylinders. Please check the idle speed air valve (slide valve) and replace the part whichever is gone bad.

Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Posted on Jul 24, 2009

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