1. #1
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    LVFD301's Avatar
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    Default m1008 fuel issue

    We have a 1986 M1008 Chevy 5/4 ton military truck that we use for a brush truck. Diesel.

    Recently it was idling, and it spit, sputtered, and died.

    No fuel out was reaching the filter.

    Replace fuel pump, no fuel reaching the filter.

    Replace it again, no fuel reaching the filter.

    They put an electric pump inline, and they get fuel to the
    filter.

    any ideas?

  2. #2
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    Get on over to www.steelsoldiers.com
    all the assistance you could want for DOD surplus vehicles

    You have the TMs? You can download same spot.

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    Is there a lift pump in the tank that feeds the fuel pump? If that is shot, then no fuel would be fed to the fuel pump, thus no fuel to the filter. Also, many fuel pumps are cooled by the fuel, so if the lift pump fails and it runs dry, it could mean an early demise for that too.
    The electric pump that they put inline may have had enough suction to pull the fuel past the lift pump in the tank, making it seem like everything was fine on that end.

  4. #4
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    According to everything we find, there is no in tank pump - but nothng said about another pump.

    Thanks

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    Do you get the TM series? The mil Tech manuals will tell you everything you can possible want to know (in 6th grade language with drawings).

    Ask your questions at www.steelsoldiers.com someone/s that has restored/worked on these will answer you.

    Unit Maint manual is TM 9-2320-289-20 at:
    http://www.steelsoldiers.com/index.p...fid=file&pid=8

  6. #6
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    The 6.2 has a lift pump along the frame rail on the drivers side. Straight wire it to see if it works. If so there is an lift pump switch (oil pressure switch)at the back of the engine (right side) next to the fuel filter. It is black and roundish with 2 prongs. Those go bad and cause the fuel pump not work. The lift pump (inline electric pump) is cut on by oil pressure. I have the same set-up on my 6.5 dually.

    Oh also make sure it doesnt have an old manual fuel pump run off the cam. If so it can be a bad lever,diaphram,etc.....
    Last edited by HSFDChief600; 09-29-2008 at 08:40 PM.
    Forrest Gregg
    Chief
    Holtville/Slapout
    Fire & Rescue Inc.
    District 10 Director
    AAVFD
    IAFC
    www.holtvilleslapoutfd.org

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