The idle air control valve (IACV) is a device attached to the throttle body that helps keep the engine of a vehicle running without throttle input, such as when the car is idling in traffic or parked ...

This low pressure zone draws the air/pressure from the crankcase ... car enthusiasts who believe the PCV valve is only a ...

An oscillating control ... and the valve swinging wildly in response. Online diagnostics were run on the valve and adjustments were made to the positioner tuning, supply air pressure, and ...