What could be causing soot.

[Nhramember]

Hello everyone I have been having a problem with the engine making soot since rebuild. I had a recent Cummins emission update after my inframe. This been going on since the first 1000 miles since my inframe. I just went 3,5 miles and it made 4.15 oz of soot. I did the egr tuneup all new sensors cleaned egr. I put a new imap in the truck. Did injector test pass and leak down test to pass. Checked vgt on insite passed. I checked the accelerator to and it was off between primary and secondary pulse modulation. Could the accelerator send mixed signals? I’m at a lost trying to figure this out.