If you got a full tank of gas pulling that sending unit is going to suck, unless you have a access door on the floor of you jeep (not a bad idea to do if you don't) but what he is getting at is right you need to check the grounds and the sending unit itself, and not to insault you but make sure its wired up right to if the hot and ground are backwards it will read empty or past empty when there is gas in the tank. <img src="/forums/images/graemlins/cheers.gif" alt="" />