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Thread: Z19DT Fuel Pressure Dropping

  1. #11
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    Vehicle : Vectra C Estate

    Trim : Elite

    Engine : Z22YH

    Year : 07

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    Quote Originally Posted by Dog_Book View Post
    I’ve never done one so can’t advise but if it’s easy to do it’s the first port of call as that small part does the controlling of the pressure bit. If the pump was gone it wouldn’t be able to make the higher pressures? Look out for relearning though.
    Looks easy enough from when i was visually inspecting all the pipe work for leaks the other week. I had the same thoughts, that if it were the pump; it would never make the higher pressures even if you were to roll into it. But from the live data, it does make the full pressures when you ease into it, it lower gears anyway. Once you're into 4th gear it'll keep going without any issues.

    I'm sure somebody else will chime in if I'm incorrect, but i don't believe you need to do any re-learning for a replacement Regulator on this engine. I do have the tools required to do it if necessary, ill have a poke about in the Fiat Diag software. That's if a genuine GM fuel filter doesn't cure it.

    Thanks again for your input, its helpful to have somebody to bang heads with.
    Vectra C 2.2 Direct Elite Estate Misty Morning Blue
    Grande Punto Sporting Z19DT Tom Procko Tuned 170BHP Imola Yellow
    Tech2, GDS2, Fiat/Alfa MES and Vauxhall Security code retrieval services. Located in West Mids.

  2. #12
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    Update: Genuine GM fuel filter did NOT resolve the issue unfortunately.
    Vectra C 2.2 Direct Elite Estate Misty Morning Blue
    Grande Punto Sporting Z19DT Tom Procko Tuned 170BHP Imola Yellow
    Tech2, GDS2, Fiat/Alfa MES and Vauxhall Security code retrieval services. Located in West Mids.

  3. #13
    Regular Member northpole's Avatar
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    Year : 2003

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    replace pump as this is one of the symptoms of a HPFP on it's way out... and while you are having to replace, you might want to decide to actually make it compatible so you don't have to tank premium fuel... the info is on the forum so have a look, it's not cheap though.

  4. #14
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    Quote Originally Posted by northpole View Post
    replace pump as this is one of the symptoms of a HPFP on it's way out... and while you are having to replace, you might want to decide to actually make it compatible so you don't have to tank premium fuel... the info is on the forum so have a look, it's not cheap though.
    Are you on about the 2.2 petrol cos this thread is about a 1.9 8v diesel.

  5. #15
    Regular Member northpole's Avatar
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    Quote Originally Posted by troutybrown View Post
    Are you on about the 2.2 petrol cos this thread is about a 1.9 8v diesel.
    yes as i stupidly only looked at what engine he had in his profile... my bad

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