Engine Carbon Cleaning can help remove up to 85% of carbon and soot that has built up in the combustion chamber of the engine, a lot of times this is caused by the back pressure of having a blocked DPF, if the exhaust smoke cant escape out from the tail pipe it can get forced back into the combustion area and leaves a sticky marmite type residue on the injector tips, exhaust valves and on the piston crowns, once the dpf has been cleaned and the flow has been returned all this marmite type gunk can start to flow and start to block the dpf up again with a snowball effect scenario.
