Hi guys,
I have a healthy 1999 Impreza EJ22 with about 180,000 miles running in my 1987 GL with a good aftermarket fuel pump. It's pumping a consistent 38 to 45 psi.
My questions is: When the vac line to the fuel regulator on the fuel rails is disconnected, is it still supposed to flow fuel back to the tank? I have a steady stream and pressure with it connected. When I disconnect it, the stream reduces very slightly but is still strong and the pressure rises a few psi. I'm trying to diagnose if it's not regulating properly - also temperature dependent... I'm having stalling issues when the car is hot and it doesn't throw any codes.
Thanks,
SK