Most of the early rebuilds were mainly just a reseal and adjust as the main reason they were replaced was the pmd going bad. For all the bad rap the DS 4 gets it's actually a fairly good pump with a pmd issue
My raptor hasn't missed a beat. Lifetime warranty. Our fuel is pretty clean up here. I can't remember the last time I changed a filter. Guessing 50k on it. I can't hear it over the 6.5
So it sounds like in post 66 you unplugged multiple things. When doing the CPS/OS test everything else stays plugged in. You don't unplug wit the engine running either. The whole point is to isolate just that one sensor and then try to start it . In limp mode it uses a basic tune. (A getcha home...