mine was doing the same. millerboyz is right. check the connector tube nuts. More than likely you are getting a high pressure fuel leak around the injectors

 

when they get real bad it may not start but running like junk after warm is classic fuel tube nut symptom

 

Well, You were right - I torqued the tubes today, and they were loose - most had to turn 1 whole revolution to torque to 37. And my power is back!! and no more stalling!! Thanks guys

 

Glad to hear it man, sorry you had to spend so much money. The airdog was money well spent though.

 

I have been having this same problem can someone tell me where the location of the fuel tube nuts are??.....please help

 

You have to remove alot of stuff to properly get to them. You have to remove the injector lines and then either a big socket or a crows foot on the nuts that hold the tubes in. The crows foot was kind of expensive and I was able to use a socket that I already owned. The torque is supposed to be 37 lbs. but I've heard many suggest 40 without any problem. I torqued mine to the 37 lbs and it was literally like magic - POWER to spare - and still running strong today at 215,000 miles.

 

i am having the the same exact problem dodge said Ecm I think not considering problem started after I blew a pin whole in the number 4 fuel line . What size is the fuel connected but on a 2003 5.9 Cummings 2500