2007 isx cm870... PLZ HELP

[Chamberpains]

Long winded is good. More details are always a help. I can't find fault code 413. Its probably the wrong number. Your truck is running hot. More than likely a thermostat problem being it didn't overheat.

As far as swapping an actuator with a junkyard one... Well you could've just put another junk one in its place. How about pulling all of them and checking them with Rawze instructions on how to? After thats confirmed good then doing an injector test or 2 wouldnt hurt. There is instructions on how to do those also on Rawze's video's or Cummins quickserve. Its free, just register you engine serial #.
It sounds like you may have bought into a real crap shoot of problems.