CAT 2008 C7 Regen

I have run into a snag with my Yard Dog and can't get it to regen properly. It has a 2008 Cat C7. During Regen I am getting ARD flame temps of 1800 degrees plus. Ard outlet of 1000 degrees, DPF inlet is 950 degrees and DPF outlet temp doesn't get hotter than 550 degrees. My pilot fuel pressure is between 45 and 95 PSI but my ARD main fuel pressure is 0. I have replaced both of the pressure regulators in the transfer pump and run two bottles of blue nozzle cleaner through it without anything changing. Does anyone have a direction for me to go from here? Any help would be appreciated. Thanks!