Fuel pressure problem...help
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Fuel pressure problem...help

  1. #1
    whats a goodtime cost? Nixonnow's Avatar
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    Default Fuel pressure problem...help

    I have a mechanical Holley fuel pump feeding a 750 double pumper Holley on my 454 bbc. I have an inline gauge on the fuel rail and at idle it reads 10-12 psi. Isn't it supposed to be more like 6-7 psi? I won't idle and I'm assuming this is why. Too much pressure. Should I put a fuel pressure regulator on it? And if so which one?

    I was looking at this one. Whatcha think? Thanks.

    Aeromotive 13215 Aeromotive Marine Carburetor Fuel Pressure Regulator



    The thing that confuses me is that it idled and ran fine all summer last summer. Brand new carb as of early last summer. Any help is appreciated. Thanks.

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  3. #2
    gn7
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    A brand new needle and seat might have held that pressure. Same goes for the o-rings on the needle assembly. But its too much pressure regardless if it worked or not.
    You don't need a some high dollar reg for a single 750. The Holley 3/8 reg is all you need and its much cheaper, and it a damn good regulator. LINK: Holley reg.



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  4. #3
    whats a goodtime cost? Nixonnow's Avatar
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    Do I need to run a bypass back to the tank with that Holley regulator. Or is it just one in and one out? Thanks. Not too savvy on the whole fuel regulator choices so sorry for dumb questions.

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  6. #4
    gn7
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    Quote Originally Posted by Nixonnow View Post
    Do I need to run a bypass back to the tank with that Holley regulator. Or is it just one in and one out? Thanks. Not too savvy on the whole fuel regulator choices so sorry for dumb questions.
    No you do not need a bypass. Its a simple in and out regulator.

    Be carefull when you order it, because the 803BP is a bypass reg and looks EXACTLY like the 803.



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    Last edited by gn7; 04-21-2012 at 09:26 PM.

  7. #5
    whats a goodtime cost? Nixonnow's Avatar
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    Thanks gn for all your help. I think I've got it figured out now. Thanks again.

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