Fuel delivery issue

[z86trev]

Truck is a 2002 suburban with the 5.3 flex and 153k. So the truck wouldn't start two weeks ago unless I put starting fluid in the intake but then it would stall. I went to move it in the the driveway after spraying more starting fluid and the truck was fine and ran great. I took off the fuel filter and the inside rattled around. I cut it open and the filter was black so I know it was shot. New filter on and the truck runs great! Until this morning, same thing where it just cranks but runs on starting fluid. A friend of mine checked the pressure while it was running and it was at 46psi. Is that acceptable? I am pretty sure that a fuel pump is in my future. The previous owner had it from 60k up until 151k and they said they never did it. Thanks for any guidance.

 

[z86trev]

Anyone? Fuel pump relay in under hood box is good. I swapped it out. I don't hear the pump kicking on though.

 

[Soundmound]

I just replaced my fuel pump because it was at 42 psi. The new one brought me to 48psi.

 

[z86trev]

It was the plug connection from the factory harness to the fuel pump.

 

[electro]

It was the plug connection from the factory harness to the fuel pump.

 

[z86trev]

And using starting fluid to get the truck going to move it out of the way, it rotted out some diaphragm in the fuel pressure regulator. I may have fouled the O2 sensors as well since I got two lean codes thi week.