My uncles powerstroke on his way home one day just lost power he said intermittently it would lose power then come back alive. Real hard starts and sounds like a miss. He let it sit awhile and now it has no power at all truck will barely move if you can get it started. It will get up to about 40mph in a mile or two. I've been doing some research but do most of my work on Cummins trucks. Any advice? code reader isn't telling me anything. Only weird thing I saw monitoring it was engine load was at 0% all the time and maf as at 0. Line pressure was saying 5psi at idle and 95 when I stomped it. Thanks

 

Did you check the cam shaft sensor? I had one go on my 99 Powerstroke.

 

No just been looking through posts, there seem to be a lot of problems with the harness through the valve covers. I'm just not use to these overly complicated power stroke systems.

 

idk if this will help, but I saw a video on youtube and the guy showed his screeners in the fuel tank and they were completely gummed up.. so it could be starving for fuel.