So I got my GT500 fuel pump put in today. I got the one for the older 09 and below mustangs as the dealer said. I got my car back and it was almost on E so I stopped to fill up and 6 gallons later the pump stoped. Tried to top off but was full. Started my car and says 3/4 full? Any ideas or is this normal with the GT500 pump on a 07 GT?