What is causing power loss when pulling a 6 ton load? Had engine light come on, limped to a dealer.
The dealer claims it was a computer re-calibration required. TSB 09-16-8. After this was performed, hitched up my fifth wheel for the trip home, and into the first moderate long grade, same problem, loss of power and the engine light comes on. I found if I pull over and turn off the engine and wait a few minutes, it seams to recycle and run fine for awhile, then the same thing.