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Thread: misfire and emmisions light

  1. #1
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    Default misfire and emmisions light

    my 2.2 direct has once again acquired a intermittant misfire, usually at about 3 spots between 1 and 2k rpm, this has now put the emmisions light on 3 times the last taking several attempts to reset. from before it has had fpr, fuel filter, plugs and filters, the plugs seemed to resolve this before but has come back, only started after having cam and balance chain done. Any ideas or suggestions as to poss cause, or is it dealer for diagnostic.

  2. #2
    North West Regional Organiser paulvectrac's Avatar
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    Vehicle : vectra

    Trim : vxr

    Engine : 2.8 v6 turbo

    Year : 2007

    Default

    If you have chafed them things mate sounds like the fuel pump well known issue buy a continatul pump in stead of a replacement siemens one takes about 10 mins to change
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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    might be dumb question, but why would fuel pump put emmisions light on, and apart from when does misfire there no change in performance whatsoever. was hoping possibly be o2 sensor

  4. #4
    North West Regional Organiser paulvectrac's Avatar
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    Vehicle : vectra

    Trim : vxr

    Engine : 2.8 v6 turbo

    Year : 2007

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    There is alot of threads about mate if it misfires pump not pumpin enuf fuel it's down to the diaphram in the pump perishes or splits It would also bring the light on as the car will see there is not enuf pressure in the pump
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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