mm,you need some one with code reader,is light on from when you put ign on engin not running, if not i would suspect if you got electric/stepper motor for turbo actuator that the variable tubo vains are jaming causing over boost,turn engin off re start then ok for a while,egr usualy coghs black smog out rear on accelaration,,but code reader will help,ive heard of sprays to put up tubos to clean,we fit new,,
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