Poor quality diesel and incomplete combustion results in black smoke emission. For a good clean that not only cleans but also protects your fuel injectors and fuel pump, add in KM+ Advanced MultiFunction Injector Cleaner and rev up your engine to clear all the black smoke. Another reason for black smoke emission could be due to excessive carbon deposits in your engine. DeCarbonize your engine. Traditionally this will mean that you have to do an engine overhaul which is expensive and time consuming as you need to leave your vehicle at the workshop for couple of days if not weeks. Now with our new KM+ Advanced Nano Combustion Chamber Decarbonizer, you can solve your problem in a day! After cleaning your fuel delivery system, ensure good maintenance by optimized combustion by adding KM+Advanced Fuel Additives with every pump of fuel. It is cheaper than getting a Black Smoke Ticket!