Fuel pressure solved

Oct 19, 2018 6:18 PM - 612 Views Create A New Thread

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Blaine, WA

Talked to the Holley rep today
It appears the problem with the fuel pressure isn't fuel pressure, its the pressure gauge. The first question the Holley rep asked was if I had a liquid filled gauge. I have a liquid filled Russell fuel pressure gauge. He said the issue is that the gauge isn't vented and the temperature differences are what's causing the pressure to appear to drop. After I talked to him I googled the issue and there are no end of threads talking about the same issue and how to correct it by draining the fluid out. I don't think I'm going to do that, but I do have a dented spare identical gauge that I will drain and try it. If the pressure stays up, I'll just leave mine as it is and check it when I start the engine once in a while to confirm the pressure is still correct.


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  • will547
    Oct 26, 2018 at 7:51 PM

  • Good job.... Thanks for the information...

  • blade58
    Oct 24, 2018 at 7:10 AM

  • Good fine thanks for sharing the information

  • Bill33
    Oct 23, 2018 at 5:42 PM

  • Jim, I just called the Russell tech line and the rep said they don't recommend using liquid filled gauges of any kind under the hood. I don't it would hurt to put that warning on the packaging. He said the glycerin becomes inaccurate with heat. At least I asked before changing the fuel pump and filter. I wonder how many people have changed the pump first?

  • Bill33
    Oct 23, 2018 at 5:28 PM

  • Never thought about calling them, I'll give it a try. Is Russell a Holley company too I wonder?

  • jimmothershead
    Oct 23, 2018 at 11:46 AM

    What does Russell have to say about it ?

  • Bill33
    Oct 19, 2018 at 7:25 PM

  • Just confirmed it. Drilled a 1/16" hole on the top of the old gauge and the pressure stays constant.

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