actually its kinda hard to mess up the sending unit that is a very durable piece.......me on the other hand i had that same problem take the sending unit out and you could have bent the pin that actually indicated how much fuel is in there.......if you move the float up and down you will seee a lil pin that goes up and down on the actual sending unit and mine wasnt touching the actual pad just had to bend it in a lil bit more and magic it works now