Problem solved, Thanks to all!
 

I just wanted to thank all the dieselbomber community for the advice I received on this site. After a month of frustration I found a thread that described my problem and offered a solution. So anyone out there who owns a 2005 cummins that runs fine until warmed up, don't dip into the kid's college fund until you check the torque on the injector fuel tubes. If they are less 37 ft lbs, re torque and problem solved. This is a great site full of helpful enthusiasts, and I'm thrilled to be back on the road. Thanks again.