I have a 2004 F-350 6.0. The truck started losing power gradually over a few days until there is nothing above a 20% throttle. Took it to a dealer and had it hooked up and diagnosed. The truck showed an icp
fault but they said the pressure was fine, the turbo was bad. I had already replace the ipr
so I bought a brand new Garrett and installed it & I still have the same issue. The truck is hard to start, but idles fine. In park it will rev to about 3000 and no more. In drive or reverse, it will roll but that's about it.