Engine loads up with Raw fuel at idle

Sounds like you done spent enough money. Hillbilly way pull your turbo and manifold off. Start truck and locate which hole or holes the smoking is coming from. Once you find the hole that is smoking remove rockers and jakes and both injectors under that set. Swap places with injectors and bolt everything back down. Start truck and see if smoke stayed or followed the injector. If smoke stayed you have a wiring problem. If it moved the injector is bad. If you have a infrared gun you can eliminate the manifold removal most of the time. Injector drivers have been known to go bad also in the ecm but you will have multiple cylinders smoking more than likely with that.

 

Sounds an awful lot like the cam is off a tooth (or really low compression). Did you verify that every cam lobe and rocker roller is good? Did you do a cylinder cutout test? Hows that look?

At this point, I think I'd pull the exhaust manifold, plug the turbo oil feed and run it without the manifold. See if your issue is on all cylinders, or only 1. It may only clear up under load because there's enough heat in the exhaust to burn off that fuel.

2 issues I ran into recently:
1 - C15 that lost an intake lobe. Not enough air in that cylinder made it smoke (still pumping the fuel, but lacking air). Once it warmed up and got under load, it cleared up, but that's just because the exhaust was hot enough to burn it off. The intake was opening just enough to not hear/feel a miss.

2 - C12 - Similar symptoms. Pulled my hair out for a while, pulled the manifold and it was only cylinder 3 smoking and misting out raw fuel. Still couldn't find the cause until pressurized the fuel port and it was leaking by in intake valve guide. ON the C12's, the fuel drilling is close the guides, so a small crack was letting fuel dribble in. Same deal, once it got hot enough to burn off that fuel in the exhaust, it stopped smoking.

 

I was gonna say injectors stuck on open mode...but I like @maggard359 troubleshooting even better...redneck or not.

 

I agree with grapeape on the timing. When did all this start happening? If you are not straight in front of the engine when you slide that cam gear on your eyes can trick you on the alignment. That popping noise.....timing. Pin the engine and pull that peanut cover and check that in just a few minutes.