My brothers truck did something close. It would run great then a week later when eot got to 165 it would lose a injector then let it cool and it would work good then hot back to bad. it was the vch it would ohm good but if you heated it up it would open up and number 5 would stop working.
Maybe something like that electronics can do funny things.
Matt PAA #117 99.5 F-250 XLT CC SWB 4x4 4R100 Warn M12000 GPR-LED. Foil Delete. 6637. 0.50. AC. Isspro Dual Pyrometer. AeroForce. FRx. HPx. DIY SS Fuel Lines. 03 HeadLights. 4" SS Exhaust. 6.0L Trans Cooler. BTS Tunes. Custom Lighted Tuner. IH Up Pipes. EPBV Delete. AIH delete. Isspro Boost Trans. Van Turbo WW2.