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2009 Pontiac G6 Question: I have a p0301. Have changed the spark plugs and rotated coils to rule them out.

 

Question

ch30228, 2.4L 4 Cylinder, Hampton, GA, January 11, 2014, 06:02
 Rookie

What should I look at next?

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  • Answer #1

    pushrod January 11, 2014, 06:26
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     Master

    Check for vacuum leak and injector pulse. Plug wet when removed? If so, check compression. Seems we have quite a following here, hope you get it fixed!

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  • Answer #2

    Diesel Cecil January 11, 2014, 07:12
     Rookie

    I'd start looking at the injector or injector wire harness

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    pushrod, January 11, 2014, 07:29
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     Master

    Boy i sure wish i had thought of THAT!!! Do you know what injector pulse is?

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  • Answer #3

    cardocIII from Gillespie's Auto Service, January 11, 2014, 09:39
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     Master

    When does the misfire occur? At idle? Under a load? Or all of the time? Is it constant or does it come and go?

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  • Answer #4

    G. T. Service Center (4142 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG January 11, 2014, 10:56
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     Master

    Try the intake induction service, Per GM Bulletin.

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  • Answer #5

    Dr Quick January 11, 2014, 14:20
     Enthusiast

    Just rotating the coils will not show up a miss fire, as it will just move to another cylinder. Try disconnecting one coil at a time when engine is running. If when a certain coil is disconnect there is no difference in engine missing, you have found a bad coil.

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    pushrod, January 11, 2014, 21:30
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     Master

    It will change the misfire code if coil is defective and switched to another cylinder!

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