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  • Gas Gauge

    I got a good amount of water in my trunk last fall. After i cleaned it out I found the gas gauge not working. Could the water have shorted out something?

  • #2
    Yes. More likely, the rust would cause rust which insulates rather than causing a short circuit. Does your gauge read, full scale all the time?
    My latest project:
    CLICK HERE to see my custom hydraulic roller 390 FE build.

    "We've got to pause and ask ourselves: How much clean air do we need?"
    --Lee Iacocca

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    • #3
      No, it doesn't register at all. Stays on empty and doesn't move. The gas tank is full however.

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      • #4
        Take the wire off the sender and ground the wire (yellow-white) to the body of the car and turn the key on. If the gauge goes all the way to full then the problem is either the sender or your tank is not grounded. If the gauge doesn't move then either the gauge, the CVR or the wiring is bad.

        John
        Last edited by jopizz; February 26th, 2018, 05:51 PM.
        John Pizzi - Squarebirds Administrator

        Thunderbird Registry #36223
        jopizz@verizon.net 856-779-9695

        http://www.squarebirds.org/picture_gallery/TechnicalResourceLibrary/trl.htm

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        • #5
          Sorry to intrude, but I have a similar problem. When I turn the ignition on, the needle moves about 1/8th of an inch. I could be driving for a few days & stays the same. Then bingo, it's working fine. I did the test that you suggested John, & when turning the ignition on, it showed full. Could I have an Earth problem, or the Fuel Sender sticking.

          Thank you.

          Chris....From OZ

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          • #6
            The sending unit rarely 'heals' itself. More likely you have a ground issue. I suggest you follow Marcelo's solution. He used stainless screws (but brass will work as well) to do the following...
            Attached Files
            My latest project:
            CLICK HERE to see my custom hydraulic roller 390 FE build.

            "We've got to pause and ask ourselves: How much clean air do we need?"
            --Lee Iacocca

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            • #7
              Thanks Dave. I'll have it looked at first chance I get. Will give report when done.

              Chris....From OZ.

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              • #8
                Gage issue

                Originally posted by jopizz View Post
                Take the wire off the sender and ground the wire (yellow-white) to the body of the car and turn the key on. If the gauge goes all the way to full then the problem is either the sender or your tank is not grounded. If the gauge doesn't move then either the gauge, the CVR or the wiring is bad.

                John
                I have the same exact issue on my 1965 Bird. Two wire sending unit is new, tank looks very new also. I ground the Yellow wire and Gage reads full. So my question is, what is the best way to ground the tank?? I am new to this so please explain..

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                • #9
                  The best way to ground the tank is to connect a wire directly from the tank to the frame of the car. It doesn't matter where on the tank you connect the wire to. You can also put a ground wire on the sender. It has to be securely bolted to a clean spot on the frame or undercarriage.

                  John
                  John Pizzi - Squarebirds Administrator

                  Thunderbird Registry #36223
                  jopizz@verizon.net 856-779-9695

                  http://www.squarebirds.org/picture_gallery/TechnicalResourceLibrary/trl.htm

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                  • #10
                    Gas Gauge

                    Just make sure that when you drill a hole in the gas tank, that you are not actually drilling into the tank itself..... On our Squarebird tanks there is a flange around the tank. According to what I see, the Flairbird gas tank should also have a similar metal flange around the tank. A good place to drill a hole to ground it... Here is a pic of the 1964-1966 Flairbird gas tank.
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                    Ray Clark - Squarebirds Administrator
                    '59 Tbird "The Yellow Rose Of Texas" aka "Tweety Bird"
                    "It's Hip To Be Square"
                    Thunderbird Registry #33025 VTCI #11178

                    Contact me via Private Message for my email address, or (Cell) 210-875-1411 (Home) 210-674-5781

                    http://www.squarebirds.org/picture_gallery/TechnicalResourceLibrary/trl.htm

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                    • #11
                      We're going away to a Rock "N" Roll & Car Festival this coming week-end. It's 160 miles away, & I'm taking the Bird to the Mech to adjust the brakes. Whilst on the hoist I'll get him to check the earth connections for the Gas gauge. Hopefully that's all it's going to be, loose, or not making good ground.

                      Chris.....From OZ.

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