Incomplete regen and turbo delay cm871

[Big red 09]

Yes the cooler must have been leaking as I am doing the clean out now and you can tell by the shine of the soot that made it all the way into the intake I don’t have insite to use and yes I am disgusted with the tens of thousands of dollars I have spent but not sure in the Minneapolis area where to take where someone knows what the hell they are doing and especially me having time to work on this truck every night after work
I can do the work like changing the doc but don’t have software to finish job
So ya I am literally stuck in a rut The doc I am sure is original because I have driven the truck since 500k till now
Any recommendations as to where to take this in Minneapolis area would be great also
Thank you