Mechanics

CHEVY DIAG P0300 MULTIPLE MISFIRE

2005 Chevrolet Impala

Engine Performance problem
2005 Chevy Impala 6 cyl Front Wheel Drive Automatic 102257 miles

My car keeps cutting off, it is shaking and running very hard. When idlling it idles high then low. I have changed the spark plugs and I'm in the process of changing the fuel filter. I don't know what else to do. Please can you help me. Thanks
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Dhenn61
May 18, 2009.




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