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Fuel gauge not working correctly

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  • Fuel gauge not working correctly

    Hi
    The fuel gauge on my 2007 C42, is showing full continuously.My guess is the sender in the Fuel tank.
    I have looked through the maintenance manuals for some clues diagrams etc.- nothing!!!
    Has anybody had the same problem?
    Any advise would be gratefully received
    Many thanks
    Colin

  • #2
    Fuel gauge not working correctly

    Hello Colin

    Yes I'd say its the sender there known to be a bit rubbish.
    Mine works then stops. I remove the leads and give it and good clean and it seems to help.

    Mark

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    • #3
      Fuel gauge not working correctly

      Hi Mark
      Thanks for the info,will give it a try
      Cheers
      Colin

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      • #4
        Fuel gauge not working correctly

        Hi Colin

        I will do some checks on a spare C42 tank sender we have and will post an update on here later as have an idea what your problem might be

        Regards

        Malc Stewart

        Red Air UK

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        • #5
          Fuel gauge not working correctly

          Hi Malcolm
          That would be great,is Lisa away presently ?
          Many thanks
          Colin

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          • #6
            Fuel gauge not working correctly

            Hi Malcolm
            Any feed back regarding fuel tank sender
            Regards
            Colin

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            • #7
              Fuel gauge not working correctly

              Hi Colin

              I now have a spare fuel tank sender and have measured the resistance range which is 75 ohms empty and 4ohms full to the top

              The signal wire from the back of the gauge goes to the insulated connector on the sender and simply measures the resistance to ground (minus 12v)

              If this wire has a short to any metal part of your C42 then the gauge will read full but this is easily checked with a multimeter. If there a break in the wire or poor connection the gauge will read empty. The other possibility might be if the float is stuck at the top of the tube and a sharp tap with a nylon hammer or similar should fix it. The gauges themselves are quite reliable but we have a spare old type (only shows full and empty with no fraction markers) if you want to try it?

              Attached is the data sheet which I hope helps and best of luck sorting the problem

              Regards

              Malc

              Red Air UK

              Attached files vdodiptubespec.pdf (61.4 KB)

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              • #8
                Fuel gauge not working correctly

                Hi Malc

                Many thanks for the information, will give it a try.
                Let you know how I get on.

                Regards
                Colin

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                • #9
                  Fuel gauge not working correctly

                  Hi Malcolm
                  The hammer did the job a treat.
                  Many thanks,
                  Colin

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                  • #10
                    Fuel gauge not working correctly

                    Hi Colin

                    Thanks for letting me know

                    Glad the hammer or "Birmingham screwdriver"as it is known locally worked as it is always a good universal fix it tool !?

                    Regards

                    Malc

                    Comment


                    • #11
                      Fuel gauge not working correctly

                      Just for info ......we found our gauge would never read empty, the empty position on the gauge can be reset by a calibration screw on the side of the gauge . it may be coverted by a little sticker, use a small flat blade screw driver with the tank empty and re set the empty position (easier to use a plastic /unsulated screwdriver as touching the gauge body sends it full scale)

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                      • #12
                        Fuel gauge not working correctly

                        Hi Eric

                        Thanks I did not know that

                        I will store that in the knowledge banks as I'm sure other C42 owners may like to fine tune the fuel gauge accuracy

                        Cheers

                        Malc

                        Comment


                        • #13
                          Fuel gauge not working correctly

                          Thank you, Eric.
                          Seems that not many people know that.
                          Thanks again.
                          Colin

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