ponyexpress94
Diesel Power Junkie
Believe it or not the PCM is programmed to develop a "rough running" condition when the fuel level drops dangerously low, and yes it is intended to make the driver check the gauges and hopefully see the truck is dangerousely low on fuel. It is actually outlined in the Powerstroke Diesel Engine Manual that was provided with the Owner's Manual for my truck. I actually ran the tank low once to try it and while it didn't run as bad as Mike's truck it definitely had a "lope" to the idle that went away after refilling the truck.
Hope this clears it up for you.
Hope this clears it up for you.