wow all i can say is wow.i have been doing diagnostics on cars for 10+ years and this is one of the best setups for the money i have ever seen.im new to diesel though.i need some help on what i found on my truck.i did a cylinder contribution test and #3,4,7 did not pass.i guess that means the injectors are week?it had a air temp sensor code also and it was stuck at 390 degrees the whole time on the live readout,this has to be a problem correct.i also had up to 25psi of backpressure on the exhaust is this ok?one more ?i only saw 13psi of boost one time is this also normal.thanks guys

 

The weak injectors could cause the lower boost, I think 15-16 is normal for a stock truck.
The exhaust back pressure sounds high, you might have a clogged cat.

 

thank you sir