Cummins 5.9 12 valve mechanical expert

Filters filters.. hopefully not the lift pump. If by chance you put fuel in mixed with biofuel there is a very good chance you knocked some debris loose for your filters. Bio is an extreme detergent and older vehicles hate it. If you have a algae issue ( starts at the refinery tanks) you will need to dump tanks and clean them. Very hard to get rid of. I haven’t seen an additive for it. Hopefully you just took on a bad batch of fuel. We changed 2 filters from Salt Lake to Bay Area with bad fuel once. We had to leave the diagnostic tool plugged in and clear under way.
Hope you get it worked out.
Find a good hot rod cummins guy close to you. Boys are sharp!!