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Thread: Fuel pump DeVille 1997 - Problems in Iceland

  1. #1
    joivill is offline Cadillac Owners Member
    Automobile(s): Fleetwood 1976 , Eldorado 1983, DeVille 1997
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    Fuel pump DeVille 1997 - Problems in Iceland

    Dear friends in this forum , I have always have a good answer for my here, Now I have some problem with my Dewille 1997 4,6 l engine, 2 weeks a go , engine stop and will not go, I find out that it was no pressure on the fuel line, so I order a new pump and instaled it , when I swiss elictric on again , all the same no pressure, I take a 5 meter wire from the reley plug posetiv and take it to the positiv wire in the pump the gray one, the pump works but no function on the instrument panel for the tank, it show emty (45 liters on the tank) is some one here who understand my english and have some ida what is wrong.
    Thanks Johann Viljalmsson
    President of the Icelandic Cadillac Club Icecad.is


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  3. #2
    DJSG3 is offline Cadillac Owners Fanatic
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    Re: Fuel pump DeVille 1997 - Problems in Iceland

    Greets,

    Have you checked/replaced the inline fuel filter? Next check for blockage in the fuel feed pipe & pump strainer. Next check flex pipe for a leak. Is there a DTC error code like P0231 set? That would be for the fuel pump electrical circuit. If all that checks out the next place to check would be fuel sender assembly and after that the pressure regulator after that would be the fuel injectors (leaks).

    DJSG3

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Fuel pump DeVille 1997 - Problems in Iceland

    If I understand you correctly, the new pump is not running? Remember, it will only run for 2-3 seconds if the PCM does not see a cranks signal. Hold your ear to the open fuel filler pipe and have someone turn the key on, but do not crank. Do you hear the fuel pump now? If so, the pump is not the problem and it would lie else ware. Maybe a clog as DJSG3 suggests. If you do not hear the pump run, the start with a fuses and relays to see why you are not getting power to the pump.

  5. #4
    joivill is offline Cadillac Owners Member
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    Re: Fuel pump DeVille 1997 - Problems in Iceland

    Thanks for a quick answer, I think the fuel pump it self is not the problem, now it run with this direct conecting, the rely and the fuse is ok there is somthing who block the electricline for the pump and sender for the volum .
    Johann

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Fuel pump DeVille 1997 - Problems in Iceland

    Have you pulled the DTC's? Do you have any security codes? Have you checked the electrical connection to the pump? Maybe the pump overheated when it failed and burnt the contacts.

  7. #6
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    Re: Fuel pump DeVille 1997 - Problems in Iceland

    Problem happened to me, fuel pump would stop message="Service Fuel System" Turned out it was the #1 ignition relay. Use a genuine GM part, I bought a parts store relay and would not work.

  8. #7
    joivill is offline Cadillac Owners Member
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    Re: Fuel pump DeVille 1997 - Problems in Iceland

    Hello Ifind this two code current IPC U1255 and AMC B1315 current I can not find what it is fo?
    Johann

  9. #8
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Fuel pump DeVille 1997 - Problems in Iceland

    Got to the DTC Sticky at the top of the forum page. Use the OBDII link to find the code definitions. Neither of those have anything to do with the engine.


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