1996 k2500 w/ a 454 suburban easy question

[alapaha]

heres my problem forgive me i'm sure this has been posted before.
it has a hard time starting just turns over. takes 3-4 times to get it going i checked the fuel pressure with the ignition on and it is at 0 psi. when i get it started the fuel pressure is at about 30 psi at idle. i pretty sure it is the fuel pump just want to make sure before i replace it.
thanks

[maxwedge]

Welcome to AF, 60 psi is required

[J-Ri]

Check the pressure regulator. Removing the vacuum hose from it or pinching off the return line should increase the pressure significantly. If not, suspect the pump.

[alapaha]

ok i replaced the fuel pump and am getting about 52 psi while running but when i turn the ignition on i still get no pressure till i start it up

[maxwedge]

How does it start with 0 fuel pressure at the rail, something is not right in the check out results. The injector poppets will not activate under about 58 psi.

[alapaha]

i found a plug unplugged. i plugged it in now when i turn the ingintion on the fuel pressure goes up to about 50 then drops to about 10. once started it maintains about 50.

[alapaha]

i'm sure it has to be the fuel pressure regulator but i can't seem to find it's location. anyone know where it is located?

[maxwedge]

Inside/under the upper intake plenum.

[alapaha]

fuel pressure regulator was the problem. changed it works good