I bought a 2004 6.0 F250 from a seizure auction and have no history about it. The truck has 236,xxx miles on it. From the looks of it, the engine has never been opened. No EGR delete, no mods to it. First thing I did on the truck was replace all the filters and fluids. The truck was running great till couple weeks ago when it would stall at low rpms or when idling at a stop. I start it up after a minute and there are no issues. One day it stalled and would not start again. I replaced the fuel filters and its back to normal. A week later it started stalling again but would always star back up without an issue. I took the filter house (fuel water separator) out and cleaned it it had alot of trash in it. The truck still stalls out randomly. There are no codes and it does not idle rough. I can now tell when its about to happen.

1.) Throttle response starts lagging,
2.) after reving it the rpm drops to 500 then back to 650ish (it idles at around 650rpm)
3.) Throttle stops responding
4.) Stalls

If I cant get it started use starter fluid it starts but no throttle response. Shut it off and restart it and she runs fine.

Today I started watching the EOT and ECT. My ETC is usually around 190 but has been up to 200. I use the EDGE desplay to watch all my temps. I just started watching the EOT today. Drove it all morning and my ECT and EOT have not more then 5-6 degrees from each other. After not being able to start after lunch and me using a little bit of starter fluid, then shutting it off and restarting my temps were way apart.
Started at EOT 191 ECT 176
After couple mins of driving EOT 202 ECT182
When I got home EOT200 ECT190
Shut the truck off for 10 mins restarted EOT192 EOC190

I think its my IPR and ICP. I put those parts on order. Am I on the right track?