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Thread: Fuel problem?

  1. #1
    Senior Member KE70's Avatar
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    Default Fuel problem?

    My car is still not running properly but I have finally pinned it to a fuel problem.

    The car runs but very crappy when you try to rev it and you can't stab the throttle, need to gently increase it otherwise it pops and splutters. With spraying start your bastard down the throttle body it works fine and revs cleanly.

    Fuel pump seems to be fine as there is ~45 psi in the fuel line when the car is running. Also the injectors were cleaned and tested professionally.

    When I rip out a spark plug there is a little bit of fuel in there, im not sure what could be causing that.

    Any help/advise would be appreciated.

  2. #2
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    Trev
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    Before you diagnose the fuel system have a look at the TPS adjustment.

  3. #3
    Senior Member KE70's Avatar
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    TPS seems to be fine, I changed it and set the values again. There were not spot on to factory specs but they are the closest I could get.

  4. #4
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    stefan
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    45psi seems to be too high, should be more like 25psi on standard fuel pressure reg. then again when i had a malpassi reg 18psi made the engine run super rich

  5. #5
    Senior Member KE70's Avatar
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    The gauge we had was made for air so it could be wrong, lol

    But there is defiantly pressure there so that rules out the pump.

  6. #6
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    what sort of computer are you running on the car?

  7. #7
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    Ok, Closest isn't always operational tho, Nelsons sprinter developed the same problem after a night on the skid pan, Turned out to be the TPS.

  8. #8
    Senior Member KE70's Avatar
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    Yeah ill check the TPS again and let you know how it goes.

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