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Thread: Bouncing fuel pressure gauge!

  1. #1

    Default Bouncing fuel pressure gauge!

    I have a 355ci with the stock mechanical fuel pump. I installed a new fuel pressure gauge on the holley line connecting to the carb. The problem is when it's idling, the needle bounces from 2-12 psi. I bought another gauge and it does the same thing, only the needle broke in half. Do ya'll have any idea why it's doing that? Thanks

  2. #2


    Try a liquid filled gauge to buffer the pressure fluctuations.

  3. #3
    Join Date
    Oct 2009
    Danville PA.


    Did you install a fuel regulator ? So you could set the pressure ! !
    Thanks Steve

    'Stop telling God how big your storm is.
    Instead, tell the storm how big your God is!'

  4. #4
    Join Date
    Apr 2010


    mine does the same....on my 55 ???changed it from the carb to the regulator now it dont bounce as much but 1-2 psi when revving

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