I have a 2002 Ram 3500 with the 5.9L. Lately when we start it up from a cold start it will stall out (whether driving or if we just let it sit and idle up to temp) and it used to actually start itself back up if we were driving, but lately it takes quite a few cranks to get it back running. After which it seems to run fine. Also it seems to idle rough at times like it skips a beat every once and a while.

Engine only has 88k on it
Have done a full tune-up, plugs, wires, etc.
Ignition Switch & coil
Fuel Pump has good pressure and power
Does not throw codes when this happens
All lights (check engine, abs, brake) come on when we turn the key off then back on to restart (computer is working)

Any ideas where I go/check from here? Is there common problems with this engine that I should know about that could be connected to my problem?

 

Not sure if this would help, but have you checked all of your hoses for a vacuum leak/ bad PCV valve?

 

possibly your IAC solenoid,mine was bad and it idled very rough,wanted to die all the time,but,never threw a code,if you do reaplace it make sure you clean out all the crud built up in the throttle body,i ended up just taking the throttle body off,makes it much easier to clean..