Misfire on cylinder 6
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Northstar Engines and System Technical Discussion Discussion, Misfire on cylinder 6 in Cadillac Engine Technical Discussion; Hello I am new here and I have am having a problem with my car. I have a 2005 Pontiac ...
  1. #1
    donky4444 is offline Cadillac Owners Member
    Automobile(s): 2005 Bonneville GXP
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    Misfire on cylinder 6

    Hello I am new here and I have am having a problem with my car. I have a 2005 Pontiac Bonneville GXP with the Northstar 4.6 V8 in it. It is misfiring and I had it scanned. The code it is giving says misfire on cylinder 6. Can anybody give me some insight on this issue and also which cylinder is 6? I am guessing that the coil pack has gone bad and needs to be replaced. Any help would be great.

    Thank you.

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Misfire on cylinder 6

    The front bank is 2,4,6,8, left to right. If you pull the coil cassette you may find a bit of oil in the plug wells. Normal - the wells are sealed by cam cover O-rings and they tend to weep. BUT, check all the plug boots for carbon tracks - if a boot or plug is tracked there will be a black stripe down the side of the plug. Y ou must replace the boot(s) in this case.

    www.rockauto.com, your car/year, Ignition, coil cassettes, ICM, wires/boots (some of the later listings put the boots under "wires", an incorrect file.)

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Misfire on cylinder 6

    If you find it carbon tracked, be sure to replace the plug as well or it will still misfire and carbon track the new boot.

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