I recently bought a 1997 F250HD 7.3 4x4 5spd extended cab short bed. I pulled this truck off a friends farm where it had lived for the last several years. It had been driven about 20 miles a year and both tanks were full of farm diesel. I got it to my shop, took it off the trailer and drove it to the car wash for a good doushing. After about a mile it started missing a little, then more and more until it was about to die. I switched the tank selector from the front to the rear and it came back to life. I then went straight to the station to check the fuel level in the front tank thinking it was empty(both tanks jump around over the full mark) but both tanks were practically full. So I ran it for a while on the rear and it eventually did the same thing. My neighbor has some Powerstroke experience so I let him have it to figure out. He replaced the fuel pumps, CPS and 2 glow plugs. He said selector checked out OK. It now runs great on rear tank, but front still does same thing. Any ideas? Thanks in advance.