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P0300

not random

JF1957

By JF1957
June 3, 2013 in 2000-2014 Silverado HD & Sierra HD

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JF1957

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JF1957

Posted June 3, 2013

Posted June 3, 2013

I've been having an P0300 code lately, could it be the spark plug wires ? How long do you think they last ? last change was on dec. 2009, seem not very long time to me.

Regards

Senior Enthusiast

Chris

Posted June 3, 2013

Posted June 3, 2013

Change plugs and wires. It fixed mine. Mine was narrowed down to cyl 7. New plugs and wires and no more misfire, use AC Delco plugs and i personally used Bosch wires.

JF1957

Enthusiast

JF1957

Posted June 6, 2013

Author

Posted June 6, 2013

Do you know the gap for NGK 3403 platinum plug ?

Thanks

JF1957

Enthusiast

JF1957

Posted June 7, 2013

Author

Posted June 7, 2013

Problem solve, plug #2 was failed.

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