B6.7 CM2350

[kunzme]

I've got a B6.7 in a KW t270 (I know it's small for this group). The truck came to me with a failed DOC and DPF and a 2692 code logged. I had them recored and had the SCR checked. Replaced differential pressure sensor. Set DPF assy to 0. Flashed ECM to the most current file. Test drove 5 miles and got a 2693 code. Engine did a regen but runs rough when regenning, soot load came down to .47 from 2.68. Checked for exhaust leaks. Cut out injectors and they all pulled the same and passed performance test. Cleaned egr valve and sensor ports. Cleaned intake. Removed 6 injectors (even though we couldn't fault them) had them bench checked. Replaced crankcase filter. Will not pass the restriction test for the dpf system, but passes every other test. After doing the restriction test the ash load will go to 100.8. If I drive it with it thinking the ash load is high the soot load climbs at a normal rate and fluctuates up down, today I drove it 60 miles and the highest the soot level got to was 1.2. Eventually it would require a regen like normal. If I set the ash back to zero the truck won't make it 5 miles before it says the soot is severe level. Has anyone heard of this?