89 5.0 slightly modded fuel pressure question.
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Thread: 89 5.0 slightly modded fuel pressure question.

  1. #1
    Registered Users house308's Avatar
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    89 5.0 slightly modded fuel pressure question.

    my 89 stang has no issues with starting or running, but when i checked my fuel pressure it goes up to where i had set it at 42psi and it drops to zero immediately. in my experience when that happens its usually the regulator or fuel pump, but i have replaced the regulator with an aeromotive one, and the pump is a 190lph bbk. any info would be great.

  2. #2
    Administrator DNeinstadt's Avatar
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    Maybe I'm missing it but where are the symptoms? More specifically, what is the problem you are having?

  3. #3
    Registered Users house308's Avatar
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    no symptoms, just fuel pressure drops off right away when i have a gauge on it.

  4. #4
    Administrator DNeinstadt's Avatar
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    Are you sure your gauge works?

  5. #5
    Administrator DNeinstadt's Avatar
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    Is there an actual problem with the car or just what you have seen?

  6. #6
    Registered Users house308's Avatar
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    no problems, i worked on an explorer today that had the same issue with fuel pressure and it has a bad injector that is dumping fuel. my car runs fine and starts fine doesnt bog out, just the fuel pressure dropping off so quickly is what has me boggled.

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