06 grand prix gxp misfire

Asked by Feb 11, 2016 at 10:45 PM about the 2006 Pontiac Grand Prix GXP

Question type: Maintenance & Repair

I have a 06 grand prix gxp has 135000 and been
misfiring and running ruff has it scanned and said
number 7 fuel injector  was bad changed that still
doing the same thing now saying has misfires  
check engine  lights on then when driving flashes
read a few things about it but not sure need help

1 Answer

58,825

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

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