I bought this car back in Nov 2011, and have remapped it with superchips and added a powerflow exhaust system. Under hard acceleration its started to give a cloud of thick black smoke, it has never done this before, I have actually been awarer that there wasnt a hint of smoke under hard acceleration or reving not like my last diesel. So for almost a year its been clean burning, but now suddenly started today. Is there anything I can check or change, before given volvo dealer lots of my hard earned pennies?
Many thanks
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