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Thread: Fuel pressure problem

  1. #1
    Senior Member RACING JUNKIE mopar1968's Avatar
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    Fuel pressure problem

    :? Ok to start this, fuel pressure is running at 15 psi on pressure gauge, would not adjust down, replaced regulator with holley regulator, ran couple times, guess what 15 psi again, ordered a billet regulator from Ron Owens installed guess what ? you guessed it 15 psi again, i have adjustment screw all the way down flush with top of regulator to get 7 1/2 pounds. Any answer's to what may be going on? plugged filter? bad pump?
    Head's up the true drag race!!

  2. #2
    Senior Member RACING JUNKIE
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    Gage, not right, if the carbs are not leaking by i doubt if you really have have 15psi to the carb. I'm not a carb person, totally injection, so i could be way off o this one.

    JMO

    Zip.

  3. #3
    Senior Member RACING JUNKIE
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    1st thing I'd do is replace the gauge.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
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  4. #4
    Senior Member RACING JUNKIE
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    Mopar: I have replaced 3 Holley reg's in 6 months... one of which had a good diaphram, but was allowing fuel by it from faulty machining... causing fluctuating fuel pressure. I have one guage on the dual feed, & another liquid filled unit separately now so I can check them against each other to make sure the pressure is right.

  5. #5
    Senior Member RACING JUNKIE mopar1968's Avatar
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    :? I have allready replaced the gauge with a liquid filled one, three regulator's later still high pressure, no fuel flowing in carb, needles holding properly. :?: :?: By the way the gauge is mounted to one side of regulator and line to carb on other side of regulator :!: :!:
    Head's up the true drag race!!

  6. #6
    Senior Member RACING JUNKIE
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    Which fuel pump do you have ?
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  7. #7
    Senior Member RACING JUNKIE mopar1968's Avatar
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    holley blue pump.
    Head's up the true drag race!!

  8. #8
    Senior Member RACING JUNKIE
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    You don't have a return right? Man.... that does not make sence... I can see why you are stumped right now. I wonder if a air is entering into the fuel system somehow...

  9. #9
    Senior Member RACING JUNKIE mopar1968's Avatar
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    Right no return. I would love to go to fuel injection but know nothing about it.
    Head's up the true drag race!!

  10. #10
    Senior Member RACING JUNKIE
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    Amen to that... same here. The Holley blue... is it maxed at 15psi/output?? or can it produce more?


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