GM Firebird 1982-1992 Repair Guide

Throttle Position Sensor (TPS)

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See Figure 1

OPERATION



The TPS is mounted to the throttle body, opposite the throttle lever and is connected to the throttle shaft. Its function is to sense the current throttle valve position and relay that information to the ECM. Throttle position information allows the ECM to generate the required injector control signals. The TPS consists of a potentiometer which alters the flow of voltage according to the position of a wiper on the variable resistor windings, in proportion to the movement of the throttle shaft.

REMOVAL & INSTALLATION



  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the TPS electrical wiring.
  4.  
  5. Remove the mounting screws.
  6.  
  7. Remove the TPS and, if equipped, sensor seal from the throttle body.
  8.  

To install:
  1. Place the TPS in position. Align the TPS lever with the sensor drive lever on the throttle body.
  2.  
  3. Install the TPS mounting screws.
  4.  
  5. Connect the electrical wiring.
  6.  
  7. Connect the negative battery cable.
  8.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of a common TPS assembly

 
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