98.5 Dodge Cummins cold start idle problem
 

Hello everyone!
A family friend is having a problem with his 98.5 Dodge with the 24valve Cummins engine.
When he starts it up in the morning it starts fine then after 2-4minutes of idle it starts to miss and starts to cut out but keeps running, he shuts it off and then restarts it and it runs fine. Everything is stock such as injection pump and injectors except for the fuel transfer pump which he had replaced with a Fass DDRP(direct replacment) by a good local shop. My friend spoke to the lead man at the shop and he said it sounded like a electrical problem not a fuel problem as it only happens when it is first started in the morning or left idling for about 5-7 minutes after it has been driven and warmed up. He has a edge programer that he unplugged and it solved the problem for about 2 weeks then this morning it started doing it again. It still hasnt thrown a code. Im hoping someone can point me in a good direction on what to check for sensors or if it sounds like the injection pump or something else, I am a 12valve guy and all the sensors and the problems they could cause on a 24valve engine I am still learning on. :humm:
Any help would be great!
thanks!
-Mitch