Throttle Position Sensor

The sensor is a variable resistor control, mounted on the carburetor throttle shaft. With a reference voltage applied by the ECA, a signal is sent to the ECA which classifies the signal into one of 3 modes:

• Closed throttle (idle or deceleration).
• Part throttle (cruise).
• Wide open throttle (maximum acceleration).
  Fig 1: 1980 EEC III Wiring Diagram (EEC II Similar)

  Courtesy of FORD MOTOR CO.
  Fig 2: EEC Ignition System Schematic

  Courtesy of FORD MOTOR CO.

The sensor has slotted mounting holes to permit rotational adjustment. If sensor is replaced or if curb idle speed is adjusted, sensor must be positioned correctly or erroneous throttle position information will be sent to the ECA.