We're in the same boat...mine definitely sweeps OK, it just sweeps the span from full to empty out of scale, if that makes any sense. Plus the car has been running rich so it chugs the fuel like no tomorrow. That was dealt with this weekend. Anyway I am going to pull it out perhaps this weekend and run the car out of gas at the house. Then pull the sender and see what's up. It is all in the "as full restored" state and was a brand new sender when the tank was boiled, etc, during the restoration. Unfortunately I simply threw the original sending unit away long ago...cheers.