ok, here is what the truck is doing. first time to start for the day the truck cranks strong, fires, runs for a couple of seconds then drops dead. it does this a few times before it stays running. then sometimes it will start fine then stall out randomly, i've noticed when it does this that it's just put in gear or barely rolling from a standstill under light throttle. the computer isn't throwing any codes when it does this and it's annoying to deal with. i've tried to cycle the key a couple of times and let it sit about 30 seconds before cranking but that doesn't seem to make any difference. the truck is a 2003 Ram 2500, auto trans, 4x4 that is stock with 160K on it. any help would be awesome. Update: the fuel pump runs for about 35-40 seconds before shutting off. If I let it do this then cycle the key and start the truck it is less likely to sputter or stall out. Also could the FCA cause some of the heartache. The only other thing that i can think of is that i ran a tank of B20 through it and changed the filter right after that. Could some gunk got caught in the line and partially plugged it?

 

OK, I got this problem solved. Faulty FCA; replaced it and runs like a top now.