Pro Comp gas gauge not working correctly

Discussion in 'Gauge Marks' started by ZoSoIV, Sep 16, 2018.

  1. ZoSoIV

    ZoSoIV New Member

    Messages:
    12
    Likes Received:
    0
    Joined:
    Sep 16, 2018
    hey guys just bought a 1970 Z-28 , RS on the resto they used Pro Comp gauges and the gas gauge isn’t working correctly ... when full it shows just over a half tank and empty it shows around a quarter tank ... I’m trying to pin down if it’s the gauge or the gas tank float ... what should I look at first ? Thanks
     
  2. dave@ztech

    dave@ztech Veteran Member Lifetime Gold Member

    Messages:
    2,359
    Likes Received:
    361
    Joined:
    Mar 27, 2016
    Location:
    NY
    Check the voltage, and see if the correct voltage is at the gauge , if it is then the junk in the trunk/tank is acting up
     
  3. ZoSoIV

    ZoSoIV New Member

    Messages:
    12
    Likes Received:
    0
    Joined:
    Sep 16, 2018
    Ok thanks
     
  4. Twisted_Metal

    Twisted_Metal Administrator Staff Member Lifetime Gold Member

    Messages:
    26,429
    Likes Received:
    677
    Joined:
    Feb 26, 2004
    Location:
    Bloomington, MN
    The gauge is an ohm meter.
    It measures resistance in the circuit through the sending unit.

    It may simply be a mismatch between the gauge and sending unit resistance range.

    Try to find out the model of the gauge to find its intended ohm range.

    If I remember correctly... the sending unit should be 90 Ohms full and 0 Ohms empty.
     
  5. ZoSoIV

    ZoSoIV New Member

    Messages:
    12
    Likes Received:
    0
    Joined:
    Sep 16, 2018
    Thanks
     

Share This Page



  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.