I have a 96 F350 with the 7.3L Powerstroke. Its starting to act up and i need to get it fixed as soon as possible but i dont know where to start. When under load, or just cruising, it almost seems to backfire. It sputters for a second, then since its in gear starts right back up again and blows white for a split second. It almost seems like im out of fuel or water in my fuel but no lights light up or anything. Its a really quick buck or jerk and shakes the whole truck. Like the engine was shut off and then starts right back up within a second. Ive tried draining the fuel bowl and replacing every filter and nothing seems to help. I drive it 250 miles a day at 85mph most of the way. I keep it steady at 3000 rpm. Sometimes it just shuts off completely and i have to pull over and spend 5 minutes cranking for it to start. Is this a fuel delivery problem, or something else? Thanks in advance