Emissions Clean

[Chamberpains]

You already are spending the days with Rawze and many other very knowledgeable people. That is this site. Its all free. Stop being scared and start small. Get on Cummins Quickserve and register your engine serial number.
https://quickserve.cummins.com/info/index.html
It will have more info than you'll probably ever use. Start by learning where and what sensors are on your engine. Then learn what and where emissions components are on your engine. Then come back to this site or Rawzes YouTube videos and start pulling and cleaning piece by piece as you learn where things are. At your pace. On your time schedule. You can do many of these things in parking lots while your loading or taking your 10 hr break or 34 hr reset. It doesn't have to be done all in 1 day. Do just 1 sensor or tube or clamp or filter 1 day then maybe when you gain more confidence go back and try another 1 another day.