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Throttle Position Sensor: Description and Operation


The TPS is mounted in the carburetor body and is moved by the accelerator pump linkage. When the throttle blades are closed, the TPS provides a low voltage (under 1 volt). This voltage signal will increase to up to 5 volts as the throttle blades are opened to wide open throttle. These voltage signals provide an indication of throttle position to the ECM.