CM870 Blue Haze

[Lonestar10]

Dads CM870 2007 T-600 "Stock" no tuning. 1.6mil chassis around 200k on overhaul

Truck is hazing blue real bad stinks to high heaven.

Truck is switching engine modes or something because at one moment it can be running fine then the engine skips a beat you can hear it do something with the turbo then starts to haze real bad then it might skip again and start clearing up just to skip a beat again and haze.

for how bad the blue haze smells i think its raw fuel

when running insite engine tests it throws random codes but doesnt when driving

so far
replaced his original actuators metering and timing
new engine harness
tried a known good ECM
its being pin timing checked today

any direction to go in? im out on the road so idk if hes listening to me all when i tell him to data log it with insite and see if any sensors are going wonky.