D'bug,

I would not be worried about a new DDEC or the loss of history. If the engine has problems the new DDEC will report them, If it stays clean there are no codes. DDEC will not tell you the oil has not been changed, or the engine is about to throw a rod. It generally tells you of conditions that affect how it runs or things that could make it stop running like low oil pressure or high temps.

As to the engine quitting, if it is getting fuel in any quantity short of almost complete stoppage it will run, but not produce power. If it stops completely you will not get any fuel flowing.

The stoppage could be as simple as the DDEC having a tripped Circuit breaker, or the fuel solenoid closed or plugged filters.

What concerns me is the attitude about having Detroit and Allison check it.

I am not afraid of mechanical stuff, like Joe, but I will walk away from salespeople that I consider less than honest. I'd take a hike.