Can you help me diagnose problem 2001 8.1

[die hard]

Just wanted to add an update to the archives

After few months of messing with truck finally got a code temp coolant sensor .i wiggled the wires at sensor engine idled up then stalled I pulled rubber boot back to find the wire was barley hanging on ? Seams to be good now plenty of power on the 8.1 at 207,000 just glad truck was not my Dailey driver