Fuel pressure jumping up and down on my 1998 Eldorado
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Northstar Engines and System Technical Discussion Discussion, Fuel pressure jumping up and down on my 1998 Eldorado in Cadillac Engine Discussion; I have a 1998 with fuel pressure 75 and jumps down to 45 and misses when it dose that.. what ...
  1. #1
    allenflucas@aol.com is offline Cadillac Owners Member
    Automobile(s): 1998 eldorado
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    Fuel pressure jumping up and down on my 1998 Eldorado

    I have a 1998 with fuel pressure 75 and jumps down to 45 and misses when it dose that.. what could that be?


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  3. #2
    allenflucas@aol.com is offline Cadillac Owners Member
    Automobile(s): 1998 eldorado
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    Thread Starter

    car surging or missing

    I have a 1998 Cadillac that started surging on me about a month ago.. I have changed fuel filter, fuel reg., plugs and wires. All for no help. I checked codes and got a P0175. I ran a fuel pressure check, it's running 75 psi but when it surges it drops to 45 psi.. its like it misses when it dose this.. thanks for any help..
    allenflucas@aol.com

  4. #3
    allenflucas@aol.com is offline Cadillac Owners Member
    Automobile(s): 1998 eldorado
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    Re: car surging or missing

    thanks for the help.. and sorry if I did double post.. That 75 psi had me also.. but I don't know what the psi should be, Im thinking I may have a bad fuel reg. it's not really acting like a vac. leak. it don't do this until it warms up..

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  6. #4
    allenflucas@aol.com is offline Cadillac Owners Member
    Automobile(s): 1998 eldorado
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    Thread Starter

    Fuel pressure jumping up and down on my 1998 Cadillac eld

    I am new at this . but I need help..My 1998 cadillac eld. fuel pressure started jumping from 75 psi down to 45 psi. now I have put 2 pressure reg. on it already. and each one doses the same thing.. I got to this after the car started surging going down the road. I put a fuel filter on it, then plugs and wires and the fuel reg. then i checked the EGR valve, put new gasket on it. then another fuel reg. still the same thing.. the only code I got was P0175 rich. but with that fuel pressure jumping is when it seems to surge. I sure hope I can get some help on this.. thanks..

  7. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Fuel pressure jumping up and down on my 1998 Cadillac eld

    PLEASE don't start new threads for the same question - keep all this fuel pressure problem in one place. Thanks.

  8. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Fuel pressure jumping up and down on my 1998 Eldorado

    I swear I answered this once before.

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