CODE P0306 NO. 6 CYLINDER MISFIRE

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  • #16047 Reply

    JOHN D STOWE

    I HAVE CHANGED OUT THE FUEL INJECTOR, COIL, SPARK PLUG WIRE AND SPARK PLUG. STILL GETTING CODE P0306 ND STILL RUNNING ROUGH. WHAT IS WRONG?

  • #16055 Reply

    Anonymous

    It would help if we knew what make, model, year and engine size. After replacing these parts, the next thing to do is check compression of that cylinder.

    • #16067 Reply

      JOHN D STOWE

      2001 CHEVY SUBURBAN 1500 2W WITH 5.3L ENGINE

    • #16772 Reply

      Shane W

      It’s probably a lifter.

  • #16068 Reply

    Anonymous

    If the misfire is mostly at idle, check for the intake gasket leaking vacuum. Also check compression on #6.

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