This same problem happened to our 07 Voyage. About 20 miles down the road after getting fuel in Clayton NM power dropped. Pulled over removed fuel filter, drained, then reinstalled. I had just put new fuel filter on about 500 miles before. RV would get up to about 30 then rpm would drop. Went through process again, same results. Check engine light came on, I stopped and removed negative cable, operated lights, ignition switch, ect. Hooked battery back up and rig ran fine. Got to Raton and bought some Lucas Oil Fuel Treatment. For the next two or three fill ups I added Lucas Oil. Fortunately I had only purchased about 25 gallons in Clayton. By removing DC power the computer was reset. Now I add Lucas Oil periodically.