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Thread: Car will not start????

  1. #1
    Mafiaman111 is offline Cadillac Owners Fanatic
    Automobile(s): 2001 Deville 159k
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    Oct 2010
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    Car will not start????

    I drove the car fine yesterday. Then went outside today to move it while on the way I was thinking man she looks good. I'm so glad I fixed her and kept her instead of selling it. Once I got inside I turned the key it just cranked and cranked, so i pulled codes and i get


    P0231 Fuel Pump Secondary Circuit Low

    I have already checked the fuse and relay there good. I checked the fuel rail by pressing on relief valve and no fuel came out so its bone dry. Then I turned the key to listen for the fuel pump and not a single noise from it.

    My questions are: Does this definitely mean the fuel pump is toast? How does it just go like that? and can running low a lot in the past months fry it up?


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  3. #2
    rodnok01's Avatar
    rodnok01 is offline Cadillac Owners Master
    Automobile(s): 98 DeVille, 97 DeVille d'Elegance
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    If you have power at the pump it's shot.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Re: Car will not start????

    Fuel pumps can die a slow lingering death, die instantly or in their sleep like your seems to have.

    Fuel pumps are cooled by the fuel they are submerged in and the fuel run through them. Running them dry can kill them, but I don't think running them low can as the fuel pumped through it should cool it. That said, I don't recommend playing it that close and consider 1/4 tank empty.

  5. #4
    Mafiaman111 is offline Cadillac Owners Fanatic
    Automobile(s): 2001 Deville 159k
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    Pennsylvania
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    Re: Car will not start????

    The only reason I asked that one question was because recently ive been driving the car til it was ready to sputter. May that fuel pump rest in peace she was noisy but it was a good fuel pump. and yes rodnok01 there is power to it.

    ----------

    another question will the fuel pump interchange between years

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Woodstock Ill.
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    Re: Car will not start????

    I think so, but wouldn't swear to it without crosschecking it.


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