Question about 2003 Chevrolet Cavalier

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I have a 2003 Cavalier with 90600 miles, that has started idling rough. When placed on the computer it shows P 0172 and P 0300 codes. I have changed the spark plugs, coil pack, and the MAP sensor with no luck. Help! Where do I go next?

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Check the plug wires with ohm meter should be under 1500 ohms. and make sure there connected to the right plug. check the firing order. also check cap and rotor.

Posted on Apr 28, 2010

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