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Inaccurate gas gauge 48 custom club coupe
I have a 48 custom club coupe. Recently I ran the gas gauge down until the needle was rubbing empty. Twelve gallons filled the tank, but according to the service manual it holds seventeen. The gauge appears to be wildly inaccurate. Is there a way to adjust it?
I believe normally the gauge reading has to do with the resistance of the sending unit. I don't know if there is a way that can be adjusted or if you need a different unit with different resistance. It seems that most of the aftermarket units available don't read correctly.
So my issue is similar: My 55 Fireflite was converted to 12v, and when I first got it the Temp Gage didn’t work at all. After I replaced the 6v “rundle” gage resistor which had gone bad the gage started functioning again, but now it registers way too hot, with “normal” being almost over to the hot dot on the gage. I tried a new engine sensor, but that didn’t fix it, and yes I’m sure the engine is not overheating.
If no one knows how to calibrate, guess I should look for a 12v gage (a ‘56 should fit) to replace it. The irony here is that I should have just left it busted, because it drives me crazy now!