... regulating valve if not disintegrating, soak fast, loose sediment and remove the glue, charcoal, grease on automatic choke of carburetor, ... spraying. No damage to the cracked converter of catalysis, oxygen reaction etc.. It can solve for idle speed and difficult start, ... cleaner gushes out the outside of the carburetor, in order to remove the outside oil sludge and glue; Generally 6000 kilometers ...