Mass Airflow Meter

The mass airflow meter measures temperature, density, amount and speed of air entering engine intake system. The meter consists of a platinum wire filament located within intake air stream and a circuit board with a CO adjustment potentiometer.

The wire filament is kept at 212°F (100°C) above the temperature of air entering engine regardless of composition of air entering engine. The mass airflow meter sends a temperature related signal to the circuit board for processing. Once processed, airflow signal is sent to injection ECU.