OK, it's definitely a sending unit problem. I bought a repop sending unit and it arrived today. Hooked it up in the trunk of the car and moved the float through its range of motion, and the gage reads perfectly.....'Empty' when the float is at its lowest point, and 'Full' when it's all the way up.
Of course, since we are talking about repop parts, nothing is quite right....all appears good except for the ground wire. The ground wire is connected to the sending unit body pointing in the wrong direction - AWAY from the direction it should be going. Plus, the wire is about 4" shorter than the original one, and since one would need to use additional wire length in order to route the wire in the proper direction, that makes it effectively shorter yet. I mean, really, all the engineering involved in making this thing otherwise a very good copy of the original and you screw up two SIMPLE details like these? No wonder so many repop parts have a bad reputation.
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Bill Pritchard
73 Camaro RS Z28, L82, M20, C60
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