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Thread: Fuel Screw Adjustments

  1. #1
    Join Date
    Aug 2006
    Location
    Brisbane
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    Fuel Screw Adjustments

    Hi everybody,

    After a few ideas on how to properly adjust a diesel for correct fueling. The engine is an Isuzu 4BB1 and is normaly asperated. I have a feeling the fueling on the injector pump was set a little low, after increasing the fuel a little and geting a dramatic power increase. Is it going to cause any damage making minor fuel screw changes?

    Cheers

  2. #2
    Join Date
    Jan 1970
    Location
    Camp Hill Queensland
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    I'd be fitting an Exhaust Gas Temperature gauge and keeping an eye on the temperatures. I think 720 degrees is the recommended max pre-turbo (I know you don't have one).
    '95 110 300TDI, F&R ARB Lockers, Twine Shower, Aux Sill Tank, Snorkel, Cargo barrier, 9 seats, swingaway wheel carrier, MadMan EMS2
    '85 110 Isuzu NA 4BE1 3.6l Diesel, 0.996 LT-95, Rear Maxi (SOLD)
    '76 SIII 109" Nissan ED33 5-SP Nissan GBox (SOLD)

  3. #3
    Join Date
    Jan 1970
    Location
    'The Creek' Captain Creek, QLD
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    If you are making too much black smoke you have too much fuel (black smoke is incomplete combustion - often because the engine is not getting enough air to burn the fuel, but could be faulty injectors).

    In a NA diesel, if you are not making excessive smoke, you should be ok.

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