Ok. I have to pump the pedal to start it. Fuel good with diesel clean in the last 5 or 6 tanks. Both fuel filters changed as well as oil and oil filter. Hot shot secert add to last oil change. Blue spring done. FIMC voltage checked key on 48. While cranking 48 and running and reving 48. Batteries load checked goo. Alternator new and checked. Has miss and stumble at lower rpm. Not as noticeable after drove for a little while but still there. This is my first ford and first diesel. Ran fine the first couple months after bought used. Im out of ideas.