Help 7.3 missing, no codes, did buzz and contribution tests

[Tempsho]

Lots of good information in this thread for troublshooting a 7.3L that's missing! Good luck with your problem and let us know what fixes it.

[Probuilder]

Does anyone have a link to a wiring diagram for the junction block above the drivers side valve cover? I am looking for one that will tell me which wires run to the injectors, to test them.

Sicks-0, First thank you for all your help.
Why am I getting a P0475 and P0476 code in the computer? What is this pressure valve? Now I am not getting the boost that I used to either, and the truck is consistently getting worse, as far as running and power.
KOER:
P0476 Exhaust Pressure Control Valve Range/ Performance
KOEO:
P0475 Exhaust Pressure Control Valve
Just a thought, but if my EBPV sticks when I am warming the truck up, it will smoke and have no power. Could this be a problem, and defueling the truck? Or would that not have an effect on the buzz test? (Probably not but just a 4 am thought that ran through my head when I quit working on it last night)

Again thank you all for your help.

[907DAVE]

I can shoot you some diagrams if you like, just need your e-mail address.

[Probuilder]

Dave,
Probuilder72@gmail.com
Thank you

[907DAVE]

You got mail.

[Probuilder]

I cleared all codes, reran the tests, KOER and KOEO. This was all done after checking the resistance on all injectors. They all come out the same and with in specs.

These are the new codes that I get with the AE Scanner on my laptop.
P0475
P1280 ICP too low.

Now on the idle I am running a Injection pressure of 481.96 psi and at 2200 rpm it is at 1153.2 psi. Do these numbers sound right?

The truck is the same as before, so no change.

[907DAVE]

Just for giggles try running it with the ICP disconnected......or have you done this already?