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Throttle Valve Potentiometer

Throttle valve potentiometer is connected to throttle shaft and is supplied five volts by MPI ECM. MPI ECM receives a varying voltage signal from potentiometer as throttle position changes. Voltage signal supplied MPI ECM is used to determine position of throttle plates and speed of throttle movement. This data is used for:

Throttle valve potentiometer is also used as a substitute for the mass airflow sensor.

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