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Gauge was accurate twice, only shows half full on fill up.
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Hello, The fuel sending unit is separate from the fuel pump, and that may be why you are stating "both fuel pumps". There is a good chance that the fuel sending unit was installed incorrectly, has a bad connection, or the arm and float are damaged/bent. Start by cleaning the connection, then test that resistance across the two wires changes as you lift and lower the arm.