Bob Sawyer
Well-Known Member
During the restoration of the '68 Charger, installed a new fuel tank and Spectra fuel level gauge. With 12-15 gallons of gasoline in the tank it would register only 1/4 tank at the most.
I drained the tank and removed the sending unit. I disassembled it and removed the resistor board. I did the same to thek8. rusted original sending unit. Surprisingly, the old resistor board looked good. I cleaned it up and installed it in the new unit. Checked the ohms and they fell right in the range of 12 - 75. Once everything was back together I tested it outside the tank hooked to the sending unit wire and grounded properly.
Finally, the gauge works as it should. I retested several times just to be sure.
I have the old fuel tank, so I cut a hole in it and installed the new gauge just to be sure the float did not make contact with the top or bottom of the tank when the float arm is fully up or down. If the new tank is anywhere close to the same dimensions as the old tank, I should be good to go.
I've attached a few pics for reference.
I drained the tank and removed the sending unit. I disassembled it and removed the resistor board. I did the same to thek8. rusted original sending unit. Surprisingly, the old resistor board looked good. I cleaned it up and installed it in the new unit. Checked the ohms and they fell right in the range of 12 - 75. Once everything was back together I tested it outside the tank hooked to the sending unit wire and grounded properly.
Finally, the gauge works as it should. I retested several times just to be sure.
I have the old fuel tank, so I cut a hole in it and installed the new gauge just to be sure the float did not make contact with the top or bottom of the tank when the float arm is fully up or down. If the new tank is anywhere close to the same dimensions as the old tank, I should be good to go.
I've attached a few pics for reference.