Cummins cm2350 Regen issues

[Jaielv]

My first post in this forum and thank rawze for sending my the invitation code.Found this website on YouTube . Just can’t believe there’s still people like him actually helping others god bless you rawze. Ok know back to my problem I just purchased this truck 2015 T680 with cm2350 back in September of this year 2018 and now I have issues with aftertreatment system. I started noticing fuel mileage dropping from 7.8 to 6.3 in a average liad(25,000) so I took it back to the dealer and service manager just check the ecu for any codes nothing show up so gave me this bs about being my rear ends . But now I noticed the truck was not doing any regeneration cycles and has only done it one time since I purchased this truck. This is my first truck with aftertreatment . So I found rawzes video on how to regenerate Cummins with insite. And follow all instructions but after almost 50 minutes the truck will still go and won’t register any of the outlets sensors readings. So I let it run noticed that a lot of smoke was coming out of the flex pipe just after the turbo and also from the two big muffler looking thing on the passenger side of the truck that I think are the particle filters. This has lead me to think that this filters . So any advice will be really appreciated . And thanks for any help in advance.