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Old 03-26-2015, 10:05 AM   #8
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
Posts: 5,050
Re: fuel guage problem

The gauge has a ceramic calibration resistor on the back of the gauge coil cannister. If it's cracked or not making good contact it'll cause the gauge to malfunction the way you describe.
If the gauge itself has stared to fail that'll cause this too.

The other thing that'll do this is increased resistance in the sender circuit... but that'll cause the needle to read super high, past the Full line on the face, when you fill it.
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1967 Dodge W200 B383, NP420/NP201 SOLD
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1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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