The fuel pump works at a very high pressure, much higher than required for engine operations. The function of the pressure regulator is to keep the fuel pressure within the required range and if you see a lot of fuel returning, it is normal. However you need to check if the pressure regulator is keeping the correct fuel pressure within the system.
Check the electrical connector. If it is not fully plugged in or there is some looseness in the contact between the pins, the circuit can fail due to high resistance when the contact heats up.
Are you able to restart easily when engine stalled?
Monday, July 4th, 2016 AT 3:34 PM