1999 Chevy Blazer PO300 - PO399 Numbered Code Identificatio

1999 CHEVROLET BLAZER
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JPABLO84
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Engine Performance problem
1999 Chevy Blazer 6 cyl Four Wheel Drive Automatic

Causes for a P0300 code?
Mar 10, 2010 at 1:05 PM
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LEGITIMATE007
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if I am not mistaken, that is multiple misfire, which can be alot of things, starting with the ignition module, egr valve ,intake maniflold gasket leak, multiple spark plugs or wires at fault. could be several bad injectors. so there are many things to check, even a bad catalytic converter.
Mar 10, 2010 at 2:18 PM
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