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Thread: Signum 2.2 direct misfire under load

  1. #1
    Regular Member big rich's Avatar
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    Vehicle : Vectra gsi

    Trim : Full heated leather

    Engine : 3200

    Year : 2004

    Angry Signum 2.2 direct misfire under load

    My signum has been acting a right pig this week, ticks over fine but once under load it starts to sound like a scooby :-(

    I have replaced the spark plugs with the proper Ngk Ones and it's still like it I also looked in the service history and the coilpack had been replaced around a year a go.

    I just had it plugged in to the diagnostics and all that's coming up is "misfire cylinder 2".

    Any ideas what it could be?

    Cheers big rich

  2. #2
    Regular Member markj23's Avatar
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    burnt valve how many miles?


    I would fit gm plugs they are the best

  3. #3
    Regular Member big rich's Avatar
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    Vehicle : Vectra gsi

    Trim : Full heated leather

    Engine : 3200

    Year : 2004

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    68k

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    Regular Member markj23's Avatar
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    have you got a code reader? if you have swap a coil amp from say 3 to 2 and see if the misfire goes to 3

  5. #5
    Regular Member big rich's Avatar
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    Vehicle : Vectra gsi

    Trim : Full heated leather

    Engine : 3200

    Year : 2004

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    Quote Originally Posted by markj23 View Post
    have you got a code reader? if you have swap a coil amp from say 3 to 2 and see if the misfire goes to 3

    The coilpack in in a fixed row of 4 so can't swap them round ...... I just hope the cambelt ain't jumped an done damage :-(

  6. #6
    Regular Member markj23's Avatar
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    find benny but I think when cam chain jumps it smashes the rockers

  7. #7
    Full Member Big Sig's Avatar
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    Quote Originally Posted by big rich View Post
    The coilpack in in a fixed row of 4 so can't swap them round ...... I just hope the cambelt ain't jumped an done damage :-(
    I'd like to see that, as it doesn't have one!

    Could be air leak related or even the coil pack again.
    Now I need a turbo to keep up!

  8. #8
    Regular Member big rich's Avatar
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    Vehicle : Vectra gsi

    Trim : Full heated leather

    Engine : 3200

    Year : 2004

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    Quote Originally Posted by Big Sig View Post
    I'd like to see that, as it doesn't have one!

    Could be air leak related or even the coil pack again.
    I know it's a chain.

  9. #9
    Regular Member noel.nev's Avatar
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    fuel pump made mine miss really bad b4 it died

  10. #10
    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

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    Sounds like the start of the fuel pump/reg problem mate. If its the older Siemens pump then odds on.

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