2003 no start help please 249k help me keep it climbing!
First off i have a early 2003 6.0 with 249k on it. Hey everyone just need some help figureing this truck out. I was driving home from work doing about 50mph when i realized i was not getting any more power. I had my foot to the floor and she kept steady at 50mph. I slowed to 35 then got back on it and she held steady at 35 with my foot to the floor. I pulled over and she shut off on me and will not restart. Hooked the computer up to it and this is what i got. Ficm 48 off 48.5 cranking, icp demand 1300 actual icp 500-550, duty cycle was 85. I am getting low oil pressure on the dash and the fitler housing fills quickly.She is on the verge of starting but as soon as i stop cranking it shuts off. I unplugged the icp and still no start. Pulled the ipr screen was intact and free of debris. Then got down to the hpop, its gears looked good, all fittings looked good, and the ball was still pressed in there. So im thinking its gotta be a high pressure oil leak. Any ideas on where to start? With the ipr being on the back it being an 03 can i air test the high pressure oil system through a plug on the pass side rail? Any help would be great!