I have a 2004 F250 6.0l. I had to take it in to the ford dealership to get diagnosed and they said that my ficm was fried. My truck is not displaying any codes on the display. Could the problem also be maybe chafing on the wiring harness? I been doing some research and apparently alot of time the ficm is misdiagnosed. I would think that i would of at least got some kind of error code or check engine light. What do you think?