Fuel pressure should be between 50 and 60 with the key on and the engine off. Since it has a delay building pressure, I suspect the fuel pump is weak, something or something is restricted. Interestingly, it holds pressure for an extended time. However, I bet if you check pressure cold before cycling the key, it's very low.
By any chance, do you have access to a scanner that can actuate the fuel pump on so we don't have to cycle it?
Also, there is a fuel strainer and filter in the tank and part of the fuel pump assembly. Something could be partially plugged at that point.
Let me know about the scanner.
Joe
Thursday, March 5th, 2020 AT 6:41 PM