Well, I don't know what the heck that was all about, but now that it's a bit warmer outside I tried it again and it worked. Is it possible that the cold weather was causing it to fail writing to the computer? It wasn't even really cold, 20 degrees or so.

Crisis averted. I am updating the software ...

2003 Dodge 3500 Non-HO Cummins Automatic 4x4
Predator U7130

This is an older Predator that I have had since 04 (?) on two different vehicles, never updated the software.

I recently replaced my injectors and crossover tubes, after which I was having some problems. While trying to diagnose the ...