ISX CM 570 BLACK SMOKE

[ktbtrucking]

They are almost indestructible

do not know how to quote but thank you good to know
i have cm570 with 2.2mil miles and it runs good although psi max is around 18
have pyro on exhaust manifold outside and barely can hit 300C (it is celcius because i have this one)
I has black smoke when going up hill and changing gears ( it smokes when i hit acc after change gear)
original vibration damper and ecm, rx air compressor
so i thought maybe my turbo is bad because of low boost will try to test for leaks