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Thread: Cylinder 1 Missfire

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    Regular Member JaceyBoy's Avatar
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    Default Cylinder 1 Missfire

    Guys, got my car diagnosed with this problem today, thought it was the dreaded fuel pump but it seems it could be plugs, leads or coil pack, is this a common fault on the 2.2 Direct petrol signum?, how do I know which one to replace?

    Also they reset the fault and the car seems fine again, weird, but I havent put the engine under high revs...

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    Full Member Caveman_nige's Avatar
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    its likely to fail again at high revs then.. cylinder one is nearest the belts
    My old Signum, the animal; she now rests in pieces in several other members cars.. https://www.vectra-c.com/forum/garag...vehicle&id=200
    The wifes vec show car, started as a standard daily driver and ended up like this. https://www.vectra-c.com/forum/garag...vehicle&id=709



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    Regular Member JaceyBoy's Avatar
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    Quote Originally Posted by Caveman_nige View Post
    its likely to fail again at high revs then.. cylinder one is nearest the belts
    Thanks for the reply but what do I replace?

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    Full Member Niall83's Avatar
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    I had a misfire in cylinder 4 on my 1.8vvt a few weeks ago, turned out to be the coilpack
    AirBox Mod-Angel Eye head lights-HID 5000k-Colour coded grill-GID to CID-Auto Dim rear view Mirror, Rear Parking Sensors, Signum Fog surrounds, 19" Audi A5 rep Alloys, Eibach 30mm Pro-kit Lowering Springs.
    Northern Ireland Region trip to Knockhill 2014

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    Regular Member DTi Elite's Avatar
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    before they dismissed the fuel pump did they run live data to see what the fuel pressure is actually doing at the higher end of the rev range ?

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    Regular Member JaceyBoy's Avatar
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    They didnt dismiss the fuel pump, but as it was cylinder 1 missfire we assumed it was plugs or coil pack...

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    Regular Member DTi Elite's Avatar
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    I would try running the live data & see exactly where the fuel pressure is , this may well not be it but needs looking at anyway .

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    Regular Member JaceyBoy's Avatar
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    Thought I would let you guys know that I replaced the plugs (cheapest option first) and the car is running like a dream again

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    Full Member Caveman_nige's Avatar
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    Good news and the cheapest option. Keep an eye on it though as a failing coil will kill a spark plug.
    My old Signum, the animal; she now rests in pieces in several other members cars.. https://www.vectra-c.com/forum/garag...vehicle&id=200
    The wifes vec show car, started as a standard daily driver and ended up like this. https://www.vectra-c.com/forum/garag...vehicle&id=709



  10. #10
    Regular Member JaceyBoy's Avatar
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    Hmmm just went out and booted in 2nd and it cut again, could it be coil pack failure?

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