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2000 Cadillac Seville • V8 2WD Automatic • 32,000 miles

Enter your question.2000 4.6 northstar eng idles reoght with code p0303 #3 cylinder misfire--new plugs, new#3 injector, and new fuel filter?Still shakes
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RICK RR
December 23, 2010.




Check compression, check for vacuum leak around this cylinder, check that the injector is getting a firing pulse, start here.

Mark (mhpautos)

Mhpautos
Jan 7, 2011.


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