So I just got my 1st diesel ever, fairly new to HP tuners as well, but have other tuning experience.
Anyway I got my new new tow pig home and it's obviously not stock, doesn't run like stock runs a little to good honestly I'd like to turn it down a little.
Plug my MPVI3 in and no power, find a bad fuse no big deal I think I'll be good. Try to read the tune and it starts to act like its working, I'm seeing connections firing up, fail. I try to read the trans tune, same. I attempt a few more times and I realize I don't know enough to continue so I working on removing the rub strips and working on the paint a little and now I'm turning to the more experienced for help.