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Thread: Limited power and slight missfire! Help!!

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    Exclamation Limited power and slight missfire! Help!!

    hi guys

    ive got a signum 2.2 04 auto and im experiancing some problems the car splatters and missfires at the top end of the rev range this results in loss of power and limp mode sometimes!

    any ideas ?

    i have changed the plugs and tried a new coil pack neither make a diference! my throtel body is a lil dirty but nufink magor!

    many thanks

    chris

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    Full Member Caveman_nige's Avatar
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    has this just started doing this or has it gradually got this bad.. Sounds a rather like a fueling issue to me, don't those engines suffer from fuel pump probs. how many miles has the car done
    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 nibblitz's Avatar
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    Fuel Pressure Regulator maybe. Do you get a spanner light? Can you get fault code? If you dont have a code reader I think you can retrieve fault codes without a reader, somewhere on these forums explains how..

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    hi guys the cars done 50,700 the prob just started! yes i get the spanner but wen i plug in it dosent say any codes!

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    ir revs fine if i build up the revs slowly but missfires if its quick! it drives fine if u drive it like a granny but any sort of putting ur foot down and its just a gaint flat spot!

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    hi guys thanks for all ur help had to bite the bulit today and put it into vaux! they said it will be £700 please for a new high pressure fule pump!

    fingers crossed this solves it!!

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    Regular Member Sean-2.2Direct's Avatar
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    It will be the Pump mate same thing happend to mine buy the pump your self for £370 I think I payed and fit your self easy

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    Quote Originally Posted by x111pow-signum View Post
    hi guys thanks for all ur help had to bite the bulit today and put it into vaux! they said it will be £700 please for a new high pressure fule pump!

    fingers crossed this solves it!!
    hi there, it sounds like i have the same problem a you do you only get the problem when you accelerate? because when i drive like miss daisy i have no problem but when i push the pedal all my power disappears and it smokes, is this what's happening to you? if so then i know what i have to get to sort my problem. thanks steve

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    hi steve yep exactly that! sean is it that easy?

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    Regular Member Sean-2.2Direct's Avatar
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    Quote Originally Posted by x111pow-signum View Post
    hi steve yep exactly that! sean is it that easy?
    Very easy about 10 15 mins 3 torx bolts holding the pump on to the engine then you just need to take the fuel line off the pump remember to depressurize the fuel line first by pushing the little nib in.

    you maybe able to get a pump cheaper then that the dealers will always have you off when it comes to these things

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