92 fuel pump??
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 92 fuel pump?? in Past Cadillac Vehicle Discussion; el dorado had that previous starting problems now will fire after ignition module change.. now it acts like its out ...
  1. #1
    toyotarob is offline Cadillac Owners Member
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    92 fuel pump??

    el dorado

    had that previous starting problems now will fire after ignition module change..


    now it acts like its out of fuel... i suspect fuel pump... it will not start unless i throw some gas in the intake throttle body..


    how do I do a manual fuel pump test?? isn't there a jumper wire on the diagnostic box??

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  3. #2
    vanaisa's Avatar
    vanaisa is offline Cadillac Owners Enthusiast
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    In 92 Eldo, you have electric fuel pump....
    You have fuel pressure test port in the fuel rail assembly. I think all service shops have pressure gauge - and this isnt expensive job to do...
    Those symptoms can do clogged fuel filter too (its located near tranny, below the car)

  4. #3
    toyotarob is offline Cadillac Owners Member
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    Re: 92 fuel pump??

    Quote Originally Posted by vanaisa
    In 92 Eldo, you have electric fuel pump....
    You have fuel pressure test port in the fuel rail assembly. I think all service shops have pressure gauge - and this isnt expensive job to do...
    Those symptoms can do clogged fuel filter too (its located near tranny, below the car)
    on my car, you can jump a wire to manually turn on the pump and verify that its going.. is this possible here??

    Also, I entered ECM DATA #9 and 10 one of which I think is fuel pump voltage and it showed zero. But I could be doing that wrong.

    There IS voltage on both sides of the fuel pump fuse.

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    vanaisa's Avatar
    vanaisa is offline Cadillac Owners Enthusiast
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    ECM must set fault code:
    E019 - Fuel pump fault - short
    E020 - Fuel pump fault - open
    check those codes first....

  6. #5
    toyotarob is offline Cadillac Owners Member
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    no active codes.. something went wrong though, since the day it died..

    MAT signal code and VCC engagement code (tranny) appear in history now.. also the cigarette ligher fuse was blown..

    no current codes... still no fuel..

    the crappy book is not helping... i want to find the wires that go to the fuel pump and check for voltage

    is there a way to view fuel pump voltage in the ECM data?

  7. #6
    vanaisa's Avatar
    vanaisa is offline Cadillac Owners Enthusiast
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    Re: 92 fuel pump??

    is there a way to view fuel pump voltage in the ECM data?[/QUOTE]
    I am not sure about this....
    If you think, its electrical problem, then:
    check fuel pump relay/fuse (located in interior fuse box)
    chek, is the fuel pump itself in order (grey + wire thru fuel pump to the black wire - ground)
    I hope this helps you....

  8. #7
    elwesso's Avatar
    elwesso is offline Cadillac Owners Master
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    Re: 92 fuel pump??

    Go ahead and change the filter...... And if no go, replace the pump....... The filter will need it anyway (not a bad idea, its only a $10 part anyway), and after 149k, the pump will get a little tired......

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