A mess of fault codes and limp mode

[rapidoxidationman]

P0202: Injector Circuit - Cylinder 2
P0300: Random/Multiple Cylinder Misfire Detected
P0302: Cylinder 2 Misfire Detected
P0303: Cylinder 3 Misfire Detected
P0305: Cylinder 5 Misfire Detected
P0308: Cylinder 8 Misfire Detected
P2149: Fuel Injector Group B Supply Voltage Circuit/Open

The truck sounds like the timing is really retarded (clattering like a diesel) and the throttle response MIGHT be about 10%. Turning the truck off for a couple mi utes then turning it back on will allow proper operation for a few minutes then it reverts to limp mode.
Thoughts? It's gonna be a long ride home over Teton Pass...

[Kennedy]

There is not an Edge Juice installed is there?

The LLY has had a lot of issues with the engine wiring harness rubbing/chafing/shorting and it often acts like this. Could be the injector connectors as well.

[rapidoxidationman]

No programmers installed, but I did just last Friday replace the turbo engine coolant return line to the upper radiator hose manifold. I'm thinking there is just a loose connection somewhere, now I just have to find it.

[rapidoxidationman]

Limped it home.
It seems that moving the wires around that go under the A/C bracket resulted in the ability of the engine to perform properly. Now to find out why that is...

[Kennedy]

Over by the alternator/FICM is one of the more common places for a chafe/break in the wires.

[rapidoxidationman]

I'll take a close look at that when I'm freshening the protection of the wires that go under the AC compressor. Last night's research has also pointed me towards taking a close look at the #2 injector harness: It seems that when the tight turn in the cable starts to fail, it can cause the issues I'm seeing. Heading to the driveway in a moment to dig in.

Electrical issues suck. Even with a degree in electronics.