Just got in from the N. C. trip. Truck ran fine till a stumble and then" dead pedal or limp mode" pulling away from a light, on the way down, in Delaware! I got it off the road and let it sit for a few minutes. Early Sat AM, no pro help available so I cleared the code (1693) and light by re starting a few times. Figured I'd run it until it quit and try to find a diesel shop or dealer along the way. This was a bit nerve wracking, especially on/in the Chesapeake Bay bridge/tunnel!!! But no further problems all the way to N. C. Monday AM, the only Dodge dealer in the area can't check it out but sends me to a local shop with lots of diesel experience and the correct "scanner" to figure it out. After about 45 minutes of checking it and road testing, the mechanic, who did seem to know Dodges pretty well, says he thinks its the PCM, not the VP 44. He can only get a 1689 code and he was TRYING to set other codes. He also shut down each injector, 1 at a time, and this test worked to his satisfaction. His advice was to run it, since he could not get a new PCM for a few days any way, and if it stumbled again bring it in, while in "limp mode". Never missed a beat all week, I un plugged, cleaned, "greased" and reconnected all the PCM, ECM, and Comp connections. Ran it all the way home today, 13 hours non stop, comp off, not a hint of trouble. Opinions from those wiser than myself? Should I replace the PCM? Order a VP? I don't make such long road trips very often so I'm tempted to just keep running it. It is not under warranty so I don't want to just throw parts at it!! Thanks for your input, guys. Jim G