Cummins cm2350 Regen issues

[Lonestar10]

You should not have smoke coming from the flexpipe before the aftertreatment system if there's any smoke before the after there is a crack or break in the pipe and that can cause your regen system to not work correctly because the fuel being put into it will ignite before it reaches the filters clean them.

and the output temperature sensor should read ambient exhaust temperature or higher than exhaust temperature when regenerating