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Thread: Diesel - fuel pressure ?

  1. #1
    Regular Member Led's Avatar
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    confused Diesel - fuel pressure ?

    Had the odd issue with my 54 plate 2.0 DTi, most recently was after a journey back from a trip away. Car was parked on level ground with 1/3 tank of fuel, I spent over 5 mins trying to get it to start , AA man spent another 60mins and said I'd need relaying home - great I thought at £97 to join - I wasn't a member.

    I waited another couple of minutes - turned the key and brum, the car sparked into life

    The car has played up 2 or 3 times before - usually when left 2 weeks or when parked facing up hill.

    When it was serviced just last October, the injector seals and bleed off lines where both checked and deemed OK the usual diagnosis for this kind of problem.

    Q's
    Could the fuel pump (in the fuel tank) become lazy (give low pressure) ?
    Is there any way in checking the fuel pressure (or what it should be).
    Is there a non-return valve in the pump or can one be fitted to the fuel line ?

    I've had the car from new and it's now covered just 41K - just want to sort out this starting issue when left for more than 4 days or when parked up hill

  2. #2
    Regular Member rosssri's Avatar
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    My old vectra b 2.0dti had the same symptoms as this it turned out it was the diesel return pipes had become pourous which was causing the diesel to run back into the tank. Some days the car would start 1st turn of the key then the next it would just turn over and then fire up eventually.
    Hope this helps.

  3. #3
    Regular Member solorider's Avatar
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    Vehicle : Vectra

    Trim : Design

    Engine : 1.9 120bhp

    Year : 2004

    Mileage : 139,600

    Default

    the 2.0 does not have a fuel pump in the tank,just the engine driven pump

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    It's the fuel spill pipes. The AA man is a moron if he didn't know that.

  5. #5
    Regular Member Led's Avatar
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    The AA man only did what his laptop told him

    So the only fuel pump is the one at front of the engine ? it doesn't have a seperate pump to prime the system ?

    It is the only problem/issue I have with the car - which is infuriating

    The 'fuel spill pipes' ??

    Borrowed pic from another thread.

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    This is a common problem with this type of engine. Make sure you get the genuine VX leak off pipe and new t pieces, that sould cure you problem. Use fairy liquid to put pipes on t pieces as they break easy and leak off conections

    If for some reason it does not cure it then the injector seals are the problem and they are under the camshafts. Not a job for the faint harted






































    I f for some reason

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    What is in the leak off pipes, something i would consider changing if I had a starting issue but do they contain fuel?

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    Default leak off pipes

    Yes if you have starting problem if you are parked up for a while air get back to the pump and creates an air lock.

    Yes they carry the excess fuel back to the pump that is not used. This systenm is fitted to all diesels from the year dot when diesels were invented. Get some laytex gloves keep the dielsel of you hands its hard to get rid of the smell.

    Coke is a good thing. I was driving down the pacific coast Higway in California when a tanker went past leaking diesel it covered the windcreen. I pulled into a garage and asked if they had anything to get diesel of the windscreen and he said coke. It was brilliant now I pour it on my hands if I diesel on them.

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    so its not a case of removing the pipes and you empty your fuel tank

  10. #10
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    Default leakoff

    get a one way valve from motor factors |(about £12) and fit it in the system at the engine end

    helps a lot

    i had the same on my 2.2dti

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