Hi car owners with direct injection engine (GDI/Gasoline Direct Injection), would like to understand more about cleaning of carbon deposits on the intake valves.
Anyone has experience to share about such cleaning service - chemical or mechanical - is available locally? Or has anyone tried to diy?
More info on the need for cleaning can be found here:
http://www.aa1car.com/library/intake_valve_deposits_gdi_engines.htm