Visbella Throttle Body & Air Intake Cleaner is a powerful solvent blend that will quickly remove gum, varnish, carbon and other deposits. It can improve engine performance by dissolving deposits that build up and cause rough idling, hard starting, stalling and poor acceleration. It will clean the throttle valve, throttle body, idle air control valves, PCV valves and other parts of the air induction system that have deposit accumulation. The product will not harm oxygen sensors or catalytic converters.