GM Cavalier/Sunbird/Skyhawk/Firenza 1982-1994

Throttle Body

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REMOVAL & INSTALLATION



See Figures 1 and 2

  1. Disconnect the battery cables at the battery.
  2.  
  3. Remove the air cleaner assembly, noting the connection points of the vacuum lines.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: When removing the air cleaner assembly, make sure to tag any vacuum lines or electrical connections

  1. Detach the electrical connectors at the injector, idle air control motor, and throttle position sensor.
  2.  
  3. Tag and disconnect the vacuum lines from the TBI unit, noting the connection points. During installation, refer to the underhood emission control information decal for vacuum line routing information.
  4.  
  5. Disconnect the throttle and cruise control (if so equipped) cables at the TBI unit.
  6.  
  7. Unfasten the fuel return line.
  8.  
  9. Disconnect the fuel feed line.
  10.  
  11. Unfasten the retaining bolts, then remove the TBI unit.
  12.  



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the throttle body mounting - 1984 Model 500 throttle body shown

To install:
  1. Installation is the reverse of removal. Make sure to clean the gasket mating surfaces.
  2.  
  3. Tighten the TBI retaining bolts alternately and evenly to the following specifications:

    1983-85 2.0L OHV engine: 26 ft. lbs. (35 Nm).
     
    1986 2.0L OHV engine: 17 ft. lbs. (23 Nm).
     
    1983-86 1.8L OHC engine: 17 ft. lbs. (23 Nm).
     

  4.  

 
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