This is my first post and I am looking for some help, if this is not the right place for this please feel free to move it. Last year I put a junk yard Gen III 5.3L out of a suburban into my CJ7. I did the harness myself and had the pcm tuned by Wyan @ 150tunes.com. At first the motor seemed to be running fine then it started smoking at start up. I connected my scan tool and the long term fuel trims were way off bank 1 was reading 25.0 and bank 2 was -15.?. I posted on Pirate to my findings and the following is what I was suggested to check and the out comes.

Clean injectors by soaking in seafoam - When I was pulling the injectors out I broke on of the ears that retains the injector in the rail so I put all new injectors in.

When I put in the new injectors the motor would not start at all. I started trouble shooting sensors, spark fuel, ect. All sensors were good, injectors were pulsing, and I had spark and still would not start, it would crank for days but not fire. I decided to check the amount of spark at the plug. The plugs were hardly firing so I put new plugs in. When I tried to start it, the motor turned over a couple of times and fired. The motor ran good and both fuel trims where the same still off but the same. When I started the motor yesterday the fuel trims were back to where I started with bank 1 @ 25.0 and bank 2 @-15.?. When I measured the temp @ the manifolds while the motor was running and they were about 150 on bank 1 and about 200-250 on bank 2. There was only one that got as hot as 300 but it was only for a min.

Other things that I have tested was compression (all @ about 150 with the exception of #8 and it was @ about 135), pressure @ the rail is 60psi. There are no code showing at all.

Any help and or suggestions would be greatly appreciated.