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Thread: High Speed Problem

  
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    High Speed Problem

    Hi Everyone,
    My 2001 1.7 DTi Van has developed a strange fault.
    Drive on the motorway at 70mph and it does not miss a beat. Drive at 90mph+ on a private test track and its fine for about 10 miles then it will loose power for a second or two then pick up with a puff of soot out of the exhaust and the engine spanner light comes on. Slow down to say 70mph and its fine. Could it be a fuel problem? Just been serviced with air and fuel filters. I do about 800 motorway miles a week. Its now done 153000 miles.
    Has anyone got any ideas?

    Thanks In Advance

    Paul

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    Sounds like it's losing boost for a little while. Probably the boost solenoid.
    2007 Metro Blue 5 door Mk5 Elite 1.7CDTI
    6th Vauxhall (4th Astra) in 10 years...plus a couple of other sheds...

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    The fuel filter on the right way round?
    Sounds like it might not be flowing fuel right, had a pal have a engine conversion on a 1.4 fuel pump.
    That use to die out momentarily and keep doing it till he let off the throttle and the fuel pump could catch up.
    Obviously if the filters the wrong way round, its not going to flow fuel correctly.

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    try a new filter
    its only a few £

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    Quote Originally Posted by Browny_37 View Post
    The fuel filter on the right way round?

    Obviously if the filters the wrong way round, its not going to flow fuel correctly.
    Diesel fiters are a round cartridge in the engine bay. How exactly do you put it in the wrong way round, when it's only got one side?

    The puffing black smoke is overfuelling, not underfuelling. An overfuelling diesel will go faster, not slower.

    I'm sticking with the losing boost thing.
    2007 Metro Blue 5 door Mk5 Elite 1.7CDTI
    6th Vauxhall (4th Astra) in 10 years...plus a couple of other sheds...

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    Righto ZS, i aint a diesel man LOL.
    Thought it would have been the same setup as the petrols.

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    Nope, diesels have manly filters, about the size of a can of beans, not a pansy little filter like a thimble.
    2007 Metro Blue 5 door Mk5 Elite 1.7CDTI
    6th Vauxhall (4th Astra) in 10 years...plus a couple of other sheds...

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    doent need the injectors cleaning does it? would a bit of redex do the job?
    ARDEN BLUE GSI

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    Hi Everyone,
    Thank you all again for all your help. I was very worried the fuel pump could be on the way out.
    I will check the vacuum hoses this weekend, in case one has worn through.
    Just one more question. If it is the boost solenoid where is it located?

    Thank you all once again.

    Paul

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    ade's Avatar
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    i have exactly the same problem so would be grateful to know the outcome
    drives zafira dti, astravan sportive

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