HOW A MASS AIR FLOW SENSOR WORKS
Many of the applications in which Injen designs its cold air intakes are for use on a Hot Wire style Mass Air Flow Sensor. Within this sensor there is a wire placed in the airflow path and a specific amount of current is required to maintain the elevated temperature of the “hot wire”. As mass air flow increases, the wire is cooled. As the wire cools, the resistance within the wire decreases. A decrease in resistance allows additional current flow to maintain the wire’s “hot” temperature. That current required to maintain that hot wire temperature is interpreted by the ECM as a specific mass airflow. The ECM will adjust fuel injection to match the available airflow in order to maintain proper air/fuel ratios.
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