Wynn’s Throttle Body and Air Intake Cleaner will remove sticky residue, caused by oil mist and crankcase fumes, from air intake system components as well as fuel residues, gums and resins. These tar like deposits build up on the idle speed control and butterfly valves leading to irregular airflow and erratic idling. Formulated for modern petrol and diesel vehicles, will not remove protective surface coatings and is O2/ Lambda sensor safe