ok guys, was jacking car up from the diff, slipped off the jack and came down on the jack on the fuel tank. Didn't really damage the tank at all, just a bit of a dint as the jack is a decent size. I noticed my fuel tank now reads full. I disconnect the feed wire from the sender (I only have one wire, some have 2 wires, like an earth, mine has one), and it still reads full, I earth out the wire, it reads empty but very very slowly creeps towards full. Any ideas what my issue could be? Thanks in advance.