Fluttering Fuel Gauge - NCRS Discussion Boards

Fluttering Fuel Gauge

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  • Mark E.
    Extremely Frequent Poster
    • March 31, 1993
    • 4503

    Fluttering Fuel Gauge

    With less than a full tank, the fuel gauge on my '70 flutters wildly on an almost continuous basis. With a full tank, it registers a steady 'F'.

    Although it flutters wildly, the RMS of the needle's reading roughly matches actual fuel level.

    What are the most likely causes of this? I'm hoping it might be a bad ground somewhere.
    Mark Edmondson
    Dallas, Texas
    Texas Chapter

    1970 Coupe, Donnybrooke Green, Light Saddle LS5 M20 A31 C60 G81 N37 N40 UA6 U79
    1993 Coupe, 40th Anniversary, 6-speed, PEG 1, FX3, CD, Bronze Top
  • Joe R.
    Extremely Frequent Poster
    • July 31, 1976
    • 4549

    #2
    Re: Fluttering Fuel Gauge

    More than likely you need to replace the sending unit in the tank. The wound resistor or wiper is corroded and needs cleaning. Easier to replace with a new one since it has to come out anyway.

    JR

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