Before, when I turned on the car/pump it would pressure up to about 60 PSI. Turn off the pump/ignition, pressure held at 60 PSI before slowly bleeding down.
NOW, start pump and it goes to 60 as it did before. But when power is turned off, immediately drops to 35 PSI. Thought maybe it was the pressure regulator, replace the diaphragm - same pressure drop.
Is there some sort of back check valve in the fuel pump that may have died? Any other ideas why it drops?
Bri.