What should it be at? Mine was reading 33-34 lbs at idle. It has an aftermarket in line gauge. Trying to figure out if continuous cranking (30 seconds plus) is a FPR prob or something else. Only does this after sitting for a while...
Have you noticed your gauge reading low while it cranks but will not catch? One can use fuel line pliers to *carefully* crimp the return line. If pressure immediately goes up, the FPR might need to be looked at.
You can also try priming the system repeatedly before ever cranking it.
What mods are on the car and have you pulled codes?