What would cause a chevy v6 to have multiple misfires.

Asked by PaulWages Mar 24, 2016 at 12:21 PM about the 2002 Chevrolet Silverado 1500

Question type: Maintenance & Repair

The warmer the engine, the worse it gets. Have replaced every sensor showing up on fault codes.

2 Answers
223,935

Rowefast answered 8 years ago

P0300 CHEVROLET - Cylinder Misfire Detected Random Cylinders... Possible causes... - Faulty spark plug (s) - Faulty ignition coil (s) - Clogged or faulty fuel injector (s) - Intake air leak - Fuel injectors harness is open or shorted - Fuel Injectors circuit poor electrical connection - Ignition coils harness is open or shorted - Ignition coils circuit poor electrical connection - Insufficient cylinders compression - Incorrect fuel pressure... The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem....

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