It may have been too full....I was on a hill when I filled it up and it was tilted away from the pump...there was a little gas inside the trunk on the carpet, but I can't find the place where it came out of the tank, no trickle lines down or anything...the seal around the sender doesn't appear to be leaking...I just have to watch and not fill it so full next time...plus, I got a new gas cap, I think mine isn't working appropriately anymore, at 16 years old it won't hurt