Wow..... Just Wow..... I've got 160k on my 2004 truck. Only issues I've had where A/C condenser needed to be replaced, needed both front wheel bearings, both rear axle seals, transfer case output seal and had the transfer case rub problem.... Motor was fine after 125k of "juiced" tuning ranging from +100hp to +330hp, and I'm NOT easy on my vehicles. Killed the transmission, but that was my fault due to running the big tunes. The only reason I just swapped a LBZ motor in was because I WANTED to upgrade to the LBZ ECM, TCM & 6-speed transmission. There are MANY, MANY others out there with similar lack of major problems and more miles. I'd be willing to bet that you and your friends monkey-futzing with it is why it's STILL having issues. You where just throwing parts at it hoping to fix it, while you don't have the right tools to determine what the actual problem is or was.
Granted, the LB7's had a lot of injector issues, but injector issues are very rare on the LLY's and LBZ's. I still find it unlikely in the EXTREME that all 8 injectors where bad. Heck , while I had the top of my LBZ motor apart and the rails off and cleaned everything out, the crap that was in the fuel lines was surprising.... Rust and such.... but after cleaning the rails and lines, putting it all back together and running it for the last month, balance rates are all +/- 0.5mm.
Based on this thread, I'd say you're either clueless or FOS. YOu should put the truck up for sale here... I bet someone would buy it, fix it and it would be good as new inside a week....
Man I sat there and watched them put each of the 8 injectors on their computerized injector squirter machine, I saw the fuel pressure going into the injector go up to 350 bar. I heard the solenoids click on each, but no fuel came out of the injectors. This injection shop is huge, they do pretty much all the injector testing on big trucks for okc and tulsa, cummins, detroit, cat, etc, they are big time, they have the newest equipment. If the cummins southwest branch in okc on mcarthur and reno need injectors tested, they send them there. They know what they are doing, and I am telling you that all 8 of those injectors were bad. I swear to god, if they weren't I would not have bought 8 new ones, which as you saw earlier in this thread i did prove that I bought. As rare as it may be, it happened to this engine. I am so sorry if you think it can't happen, because it did most certainly happen in this case. I am extremely happy for your success with this motor, I just don't see it being very durable.
Where I come from, if something breaks, you buy new parts and put them on and it is good to go. If the cylinder head cracked on my old cat dozer, I would buy a whole new cylinder head, valves, seals, retainers, springs, exhaust manifold, bolts, gaskets, turbo and anything else I took off.
It's having major issues, like a melted number 8 piston... It aint my or my buddy's fault the injector hung up and melted it down! It now is screwed, it has no compression on number 8, either one of the valves are jacked or the piston is broke or melted, I don't know yet. Probably piston because it was knocking. The only thing I did wrong was I forgot to tighten the t50 torx plug on the back of the fuel rail!! Good god hang me out to dry and burn me at the stake I made a mistake! You ever made a mistake putting something together? Nah of course not, just idiot newbies like me do that. Alright, so I got it to run after that loose plug, but it smoked white like crazy! Didn't diagnose it, so I junked it shame on me i was having personal issues with my wife and blah blah I junked it to make a point, alright. Then i bought it back, and we got it to stop smoking and then while running around it started knocking. We didn't touch anything!!! Just hotrodded it with his edge juice module, never overheated!!! So I don't know how we were monkeyfutzing with it.
