I just bought my 98 tj and i have a problem. I filled up the tank one day on the way home. The next day i went on a 5 mile loop to turn in some job applications. When i stopped at the first place it said i had over 3/4 of a tank(wow that seems low). When i stopped at the second place, it said i had less than 1/4 a tank (what?!). and when i was leaving the third place it said i had between 1/4 and 1/2 tank (...). What is causing this? could it be the fuel pump sending unit, or the fuel gauge, or somthing in between? Is the sending unit a recalled item?