Cm870 acting dumb.

[Lonestar10]

My dad has a 07 Kenworth t600 with a cm870 13sp overhauled last January turbo is also only a year-and-a-half-old the turbo vgt control module is only 3 months old. Stock programming injectors and head replaced with overhaul. Also he did find some leaks on the airline from module to the turbo and fixed them
EGR valve is new and supposedly he's replaced the typical three sensors you just doesn't remember which one was when.

Basically he's having an intermittent issue where he can go into a hill and have 38 lb of boost and perfect 800° egts or he goes into a hill and has 30 lb of boost and almost 11 hundred degree egts the truck is also running extremely warm it's basically having to run the fan constantly to maintain temperature. There has also been a few instances when it's idling suddenly there's blue or bluish gray smoke coming out of the exhaust and it smells terrible not like fuel but something else and burns your eyes. He says no abnormal oil usage and he doesn't add any water.


Anything he should look at guys I'm not sure on the 870 what could be causing his issues and it's not as diagnosable as the 871 with electronic actuator for me


Thanks!