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Old 07-14-2010, 11:45 AM   #3
fixit-p
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Join Date: Dec 2008
Location: Yay Area CA
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Re: fuel sending unit / fuel gauge mystery

You've done all the tests now you just need to interpret your results. I see 2 possibilities 1, your float is stuck (down when in tank) or 2, when installed in tank your sender wire is shorted to ground (check the insulator or if terminal is making contact with tank). When the sender is installed in the tank is the empty reading on the gauge (float down) the same as when you tested it out of tank and grounded? If the reading on the gauge out of the tank was slightly higher than when it was installed it would point to possibility #2 above.
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