2250 issues...need advice

[Beaver]

The overhead was done at Peterbilt about 2 months ago but lets be honest about that one lol.
I'm pretty sure the ecm and settings are good but i dont have insite to check andi cant afford it right now, nor do i trust any particular shop to help me there.
My last oil sample, soot was 0.2. The 1st oil sample i did from the original oil that I had when i picked it up had the soot at 0.7 ao at least its on the way down but you may be right about the soot in the overhead.
I think maybe peterbilt didnt check that the jake brake connections in the overhead were tight or plugged all the way in.