I came to work today to run the regen and snap some pics for you guys but the truck was out on the road. About 3 mo's ago the truck was calling for regens multiple times a day. When I looked at the truck I found that the regens were failing, not able to build up enough a heat. I found the 7th injector was crudded up and spraying poorly, tried cleaning it but that didnt work, so I replaced it. After that the truck had no problem building up heat and that's when the "cycling" problem appeared. So reading the boards here I found posts that mentioned there are 2 different injectors, I double checked my part numbers, and I do have the proper injector. I swapped out the injector with another new one, as we keep a few new ones on hand. Problem still exists. I will be back here at the job on Sunday and check the data and snap some pics. Thanks once again.