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Thread: BOUNCING FUEL GAUGE

  1. #1

    BOUNCING FUEL GAUGE

    Just put together a sbc in a street/strip car , now we have noticed the fuel pressure gauge bouncing. 950 demon carb with magnafuel prostar 500 pump with adjustable pressure and 2 port regulator. checked everything for dirt or sticking bits but still does it, anyone had this happen before, still haven't ruled out faulty gauge(new).

  2. #2
    Senior Member RACING JUNKIE mytmouz's Avatar
    Join Date
    May 2006
    Location
    Pelahatchie, MS
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    983
    If it's a liquid filled gauge, that's most likely the problem.
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  3. #3
    It's an autometer but not liquid filled, i'll try a different gauge and see what happens.

  4. #4
    Senior Member DYNO TECH
    Join Date
    Feb 2004
    Location
    Leonard, Texas
    Posts
    414
    If it's not the guage, check for flow through the filter or obstructions at the fuel bung . I've seen pump cavitation (sucking air) cause this same scenario. Also how large are the inlet and oulet fuel lines. Never have a smaller inlet than outlet. Just my $.02
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