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+--- Thread: Cm875 ism derate n excessive smoke (/showthread.php?tid=4657)
Cm875 ism derate n excessive smoke - wellrun - 06-09-2019
Got an ism giving me a hell of a trouble..so far only thing I see is a small exhaust leak a the clamp at the egr cooler...but all these codes and derate for one leak??? Non deleted engine
RE: Cm875 ism derate n excessive smoke - Signature620 - 06-09-2019
It definitely appears you have a boost leak or intake restriction somewhere. The engine brake fault could be a number of things but its unrelated to the main symptoms. Also could do with a clean of the EGR piping, particularly the differential pressure tubes.
RE: Cm875 ism derate n excessive smoke - wellrun - 06-09-2019
Thanks alot