Previously "Replaced UCVH: Codes P0263 and P0281"

Recap:
Low power, rough idle. Cylinder Contribution test showed 1,3,5,7 cylinders.
Replaced UVCH. New CPS. All injector solenoids ohm at 2.8, at valve cover, 42 pin connector and IDM connector. Swapped IDM with a buddy and got same codes.

Update:
Pulled all passenger injectors as I suspected o'rings. All looked good. Replaced and then swapped good injector from Cylinder 2 to Cylinder 1 and still got a CCT code for Cylinder 1. As a side, when I pulled Cylinder 2 I had a heavy diesel smell. No diesel smell for any injector on passenger side.
Pulled the fuel line on back of passenger head and cleaned orifice no blockage that I could tell.

PIDS:
ICP: 580's PSI
IPR: 11%
ICP_V: .8
RPM: 680 ish

I have read that a bad solenoid can cause entire bank to go down, but all of my solenoids ohm good.

I am at a loss and don't want to start throwing parts at it. Really need help or suggestions. Any other tests that I'm not doing that I should.

 

When you buzz test, do you hear the bank 1 injectors?

 

Sounds like you are able to start the engine on just the left bank. With the engine running and passenger valve cover removed....can you see any oil discharge from any of the injectors? Of no, then unplug one injector at a time and see if the other 3 come online. I prefer to turn the engine off when messing with the UVCH since the voltage is quite a bit higher.

 

my brothers truck lost a solenoid pack and all it did was kill that injector, new pack no problems.
if the wires check good then look for low oil psi or bad injectors.

 

Yes,
Forgot to mention that buzz test checks out on all 8 injectors. I have pulled harness off of each injector on passenger side individually and get not change. #3 is firing a little as I notice the idle stumbles even more when I pull it off. I also have never gotten a CEL and there are no DTC's other than the CCT codes when I specifically measure Cylinder Contribution.

 

are they spiting oil? is the about the same as the DS?

 

I need to check injector oil discharge after it stops raining. Full shop and no room for the truck, so working outside. The "bad" injector that I swapped to DS is firing just fine and the "good" injector that was swapped to passenger side is not firing. It seems very unlikely that all injectors on one bank would go down at same time, right?

 

This is starting to smell like an IDM (bank out). I don't remember if you checked the ground strap, but I recall you checked the electrical connections to the IDM.

 

Is there more than one ground strap? I will recheck all the ones that I see in engine compartment.
My buddies IDM didn't fix my problem. That is what has me so confused.

 

the oil discharge will show a lot.
i dont think there is a way for the hpop not to feed one side?

 

Ah... it's all coming back to me now. We're down to the wire harness between the 42-pin connector and the IDM. That rubs on the VC and can wear through/short. You could also have a damaged/corroded pin on either end. You can either try lifting the wire bundle off the VC, ohm the bundle out, or inspect it. I believe the suspect wire is orange.

 

A damaged passenger-side check valve in the pump could do it. I don't know if there is enough HPO hose to switch sides on both.

 

Checked oil discharge. Each bank looks the same. Pulled injector harness off two on bad side to test volts and it only showed 2.9-3.1 volts while running. Shouldn't I see 120? Key on no voltage to injector on passenger side. Starting to suspect IDM or PCM. Thanks for your help guys.

 

I have pulled harness off each injector on dead bank one at a time and no change. Oil discharge is good. Only thing that I have not done is put a manual pressure gauge on fuel line or HPOP line to the passenger side head. Although it seems odd that Driver Side would be getting fuel and oil and not the Passenger Side. I may try to find a PCM and switch that as it is the only thing that I have not done yet.

 

are you 100% sure the wires are good?
if you could check the HPO on each head and the fuel psi on each head.