When i turn the key on the fuel pressure comes up and when the pump turns off the pressure goes away fast!
I have a fuel pressure regulator on the fire wall with guage for efi and a return to the tank
Why cant i plug the return and see if it holds pressure with key on? This points the the regulator being bad. And if it wont hold pressure then i need to pull the tank to check the fuel pump.
If not how would you rule out the fuel pressure regulator before dropping the tank? I have opened the regulator and do not see anything that looks like it would drop the pressure!