05 Monaco w/ 400 Cummins ISL low power /smoke.

Doug E. wrote:
ScottG, Cummins is thinking it's electronic or electrical since it fixes it's self when the ignition is turned off, and then refired.

I understand but they should be checking rail pressure at a minimum when it acts up. This is done on your eng with a simple scan tool. (In fact, you could buy a cheap scan tool to watch it yourself)
RP is a critical indicator of the health of your injection system.
Good luck and I hope it's a cheap fix! :)

Scott