Question about 2000 Cadillac DeVille

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Service engine soon light flashes at 20 mph while driving ,i have change the spark plugs and coil pack and my service engine soon light is still flashing what is the problem

I did a obd and it says P0300 which read random misfire on cylinder 5 & 8 i also did a conpression check on the cylinders and everything check ok. can anyone help me please

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Posted on Jan 02, 2017

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SOURCE: I have a 2000 Cadillac

DO SPARK PLUGS AND WIRES CHANGE IF NOT HAVE DONE TUNE UP IN A LONG WHILE. CLEAN FUEL INJECTORS.CLOGGED FUEL INJECTORS WILL CAUSE CYLINDER MISFIRE ALSO.

Posted on Mar 19, 2011

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