Was coming over the pass last weekend and blew a tire on my travel trailer. EGT's were still high so let it idle while I took care of the flat. Came back to the truck about 10 minutes later to find it had died. Tried to start and when started chugged like it was running on half cylinders. I had a valve cover harness go bad and it felt the same. Had the glow plugs and both harnesses changed about 2 months ago.

Had it towed to mechanic that did the work and has been working on it for a week and does not know what it is. Got codes for CPS, Bank 2 error and a couple other I believe are related to my tymar etc. He opening the valve cover on drivers side and looks good. Hasn't done passenger yet. Checked PCM said good. Any thoughts?? Really need to get it home.

Thanks in advance!!!!