Speedhut Fuel Gauge Level drops too fast

Electrical and Ignition

  1. Dragonsteel

    Dragonsteel Well-Known Member

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    I purchased one of Speedhut's programable fuel gauges for use in my 71' Dart with aftermarket replacement tank and sending unit. I programmed the gauge to sending unit while it was out of the tank and everything looked like it was working correctly. My issue is with the gauge fuel level drop, with a full tank of gas the gauge will stay on full for a very long time, but once it starts to drop below the full mark the level will drop all the way down to below a 1/4 tank in about 30 miles of driving. I'm thinking this is a problem with the sending unit and it's short float arm. I don't know how far I can go a 1/4 tank as I really don't be stranded on the road side. Guess I might have toss a gas can in the trunk and run the car out of gas to find out for sure.
     
  2. Dusterdenovo

    Dusterdenovo Contentedly Old School

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    Have you tried to re calibrate it with the sender back in the tank and registering where the empty and full fuel levels actually position the float arm?

    Maybe the result will be better then a bench calibration where I assume you used both limits of travel on the float arm for programming full and empty?.

    My Speedhut fuel gauge is without a doubt the most accurate gas gauge I have ever had (at any point in the full sweep of the needle), in any vehicle. With aftermarket sender.
     
  3. Dragonsteel

    Dragonsteel Well-Known Member

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    So are you saying you don't get same rapid drop on the gauge on your car?
    Yes I calibrated the gauge to the full swing of the float while it was out of the tank.
     
  4. Dusterdenovo

    Dusterdenovo Contentedly Old School

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    My Speedhut gauge is totally accurate. I calibrated it with the sender in the tank.
     
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