I have a stalling at low rpms and idle. I hooked up the fuel pressure gauge and with key on, it goes to 30 psi. When I crank it, it starts very hard and takes forever to crank. When it turns over, fuel pressure hovers between 42 and 43 at idle. When you step on the gas pedal, pressure goes down to 34 and then when you let up, it goes back to 42-43ish. Then when you turn off the car, pressure goes to 46 and after about 5 hours, it'll go down to 44ish. What is wrong? I replaced the filter and no gas is coming out of the AFPR from TPIS. Is there a kink in the line? Is the pump taking a crap? Is it the relay? Thanks in advance.

P.S. There is no trouble codes and the ignition timing is dead on at 6 degrees. What else could be the problem?

 

Is there a way to test the relay? I searched and I can't find out too much about it. Please help. I plan on swapping in a walbro cause I think I should go the LS1/T56 route later and while searching, I found out that the stock pump won't last long at the high LS1 fuel pressure.