Find the vehicle's idle air valve. It is often located on the throttle body of the engine of a vehicle. Remove the filter box. Take out the vent and disconnect the PVC line. Separate the air intake from the throttle. Locate the access point for the idle air valve. If you remove the throttle body, you'll be able to see a little hole; here is where you should concentrate your cleaning efforts. Use a throttle body cleanser to disinfect the opening. Any car dealership should sell cleaning supplies. Reconnect all of the parts