The pump kept cutting off as I tried to fill tank, spurting gas out. Tank was half full when I began and after calling over attendant, he kept asking me if tank was full--it was not!! I just stopped before trying for a full tank. Attendant claimed I might have problem with sensor in tank, acting like it was already full--which was NOT the case!! This has happened twice in the last 3 weeks. It is time for next fill up and I dread it!! HELP---DO NOT HAVE A CLUE!!