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73-87 Chevy _ GMC Trucks => Interior & Equipment => Instrumentation => Topic started by: fiddler on September 06, 2019, 07:01:40 pm
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I have a 1974 Chevy C10, (half ton stepside, 2 wheel drive). I have a replacement fuel gauge from . The gauge reads relatively correctly, (slightly above full when full). When I turn off the key, instead of remaining where it was it climbs as if the sensor line was open and there was voltage applied. I have another fuel gauge from a 73 model that works and does not do the described behavior. (I would use it but it does not have a window for the brake warning light). When i turn the key back on the gauge goes to the correct position. I cannot figure out what is driving the meter when the power is off. Anybody seen such bizarre behavior on your fuel gauge?? Thanks for any response.
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It is probably residual magnetism interacting between the gauge coils and gauge frame and should be of no significant concern.
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Thanks much! I will go with that until I run out of gas and the gauge is telling my it still has half a tank. That is what AAA is for...
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LOL. If there is no power to the gauge (ignition off) and the dash grounds are healthy (no floating feedback loops), what else do you propose? Personally, I would find it annoying and might try to degauss the gauge or substitute another, but it should not cause a problem, otherwise.
Who knows what substitute materials, processes and quality controls have been employed in the manufacture of offshore-sourced components? You could try contacting the vendor. I suspect 50/50 odds that a replacement would function similarly. In the meantime, be sure to carry your AAA card and a cell phone. ;)
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So it works great all the way to empty. I filled at empty and it took 13 gallons plus. That's close enough for me. Usually I fill just below half.... Thanks for your inputs.