Stealth R/T Turbo V6-2972cc 3.0L DOHC Turbo (1996)
Air Flow Meter/Sensor: Description and Operation
Air Flow Sensor Circuit
PURPOSE
The Air Flow Sensor (AFS), attached to the upper air filter housing, measures the amount of air entering the intake manifold to provide the ECM
with precise intake volume information. The AFS is a "Karman Vortex" type which measures the intake air volume.
Volume Air Flow Sensor Operation
OPERATION
The air flow sensor operates by means of a vortex generating column and an ultrasonic sound emitter and receiver, located in the air flow chamber.
The transmitter sends sound waves across the airflow sensor chamber. The time it takes the sound to reach the receiver without any air flow is the
reference time (speed).
As air enters the intake stream, it strikes a vortex generating column and creates vortices that swirl clockwise and counterclockwise. As the
increasing air flow passes between the transmitter and the receiver, the sound waves are interrupted by the vortices. This causes the sound waves to
