Mass Airflow (MAF) Sensor

MAF sensor is mounted in the air inlet, between air cleaner and throttle body. MAF sensor measures volume of air entering into the engine by monitoring position of a movable door. A potentiometer, attached to the movable door, signals door position to the ECM. The ECM translates door position to volume of air entering the engine.

MAF also contains Intake Air Temperature (IAT) sensor. The temperature of air entering the engine is monitored and transmitted to the ECM. The ECM is programmed to compute airflow and air temperature, so fuel flow can be adjusted to obtain optimum air/fuel mixture.