Fuel pump question

Originally Posted by TBatt

Does any of you know if the fuel pump is a constant run type using a bypass regulator in the pump assembly. I believe it is but not 100% sure.

The reason I'm asking is the pump will run for a couple of seconds when the car is turned on and then it shuts it's self off developing only 20 psi where it should be 50+ psi. It was working fine yesterday but today when I went to start the car after work it took a long time for it to start and then it ran terrible due to the low fuel pressure (very lean). I managed to limp the car home, barely.

I have the CJM fuel gauge installed along with a AFR gauge so this is how I know it is a fuel pressure problem.