Fuel Sender Issues

[RPOLS3]

I am having this same issue in my Chevelle - installed new tank and sender last night to replace cursty but working original units. Tested new sender prior to install. Hooked up power wire to sender then hooked up ground, moved the float up and down and the gauge in the car worked as it should. Installed everything and put 5 gallons of gas in car and the gauge reads empty. If I disconnect the power lead to the sender the gauge reads full. I had to drill a new ground as the new sender wire was too short to make the old location work, thinking that might be the problem. Ran out of time and will try again this weekend......ugh.

[Bill Pritchard]

Originally Posted by RPOLS3

I had to drill a new ground as the new sender wire was too short to make the old location work...

I experienced the same thing 15 years ago when I got a repro sending unit for my old 69 SS396 convertible. They make all the rest of the sending unit correctly and then 'cheap out' by making the ground wire a few inches too short! When I called whomever I bought the repro sending unit from, they claimed they had no complaints from anyone else on that issue, which I found hard to believe. Solved the problem by returning the repro unit and sending my original to John Wolf in Ohio, who correctly restored my original sending unit.

[X66 714]

I bought 3 for the cuda. one single line & 2 double lines. None work correctly. They all are 1/4 tank off & no matter how you modify the float, doesn't help. It read 1/2 tank when it has 3/4. Better this way than the other.....Joe