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Thread: 2.2 Direct Petrol unstable acceleration

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    Default 2.2 Direct Petrol unstable acceleration

    I have an 04 2.2 z22yh engine vectra and I'm now pulling my hair out. Last week the car went into get you home mode warning lights on. Had a mobile mechanic look at it ran the diagnostics which showed Air Mass fault. This was changed, it then showed faults on Cylinders 1 and 4 the coil pack was changed. Its still doing the same fault. Basically when accelerating it feels as though its misfiring. The car is jerky to drive and struggles to reach anything above 4000 RPM no matter what gear is used. Does any body have any ideas. There are no fault codes in the ECU as these cleared after the air mass was changed.

    Please help

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    Regular Member steve.s's Avatar
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    has it been in for the fuel pressure reg recall

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    No idea car was bought in Feb didn't have much service history.

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    Regular Member steve.s's Avatar
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    may be an idea to ring your local dealer and say you have heard of this recal and if your car is affected, give them your reg and they should tell you, hope this helps

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    Worth a try just banging my head against a wall. Serviced it in feb changed the spark plugs again before just in case one was faulty, cheers

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    My car is doin a simular thing atm and i found it to be an ijector wiring issue! Not sure if it helps but the car is jerking around and has lost all its power and just runs dead slow!

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    Regular Member rushy's Avatar
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    Quote Originally Posted by richiem View Post
    My car is doin a simular thing atm and i found it to be an ijector wiring issue! Not sure if it helps but the car is jerking around and has lost all its power and just runs dead slow!
    Common problem on the CDTi mate but not the 2.2 petrol. It'll be the HP pump or Reg for sure.

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    Regular Member Sambor's Avatar
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    What about timing chain mates?How much You got on the clock.I changed my timing chain,timing balance chaine and water pump.Car is much different.More power(it means came back to his roots) and going smooth from gear to gear.But can be something different.

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    Quote Originally Posted by richiem View Post
    My car is doin a simular thing atm and i found it to be an ijector wiring issue! Not sure if it helps but the car is jerking around and has lost all its power and just runs dead slow!
    My vectra Z22Yh did the same replaced plugs twice, coil pack twice EGR, had FPR done on recall, still ran like a bag of spanners turned out as last resort bought the continental fuel pump swapped over and car ran smooth, and after 3 short runs, with restarts, EML light went Off.

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    Hp fuel pump oil seal popped I had it on mine till I rebuilt the pump get fuel pressure tested should be 5000 kpa

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