GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Injector

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REPLACEMENT



See Figures 1, 2, 3, 4, 5 and 6

  1. Relieve fuel system pressure as described above.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the air cleaner.
  6.  
  7. Remove the electrical connection to the injector. On Model 300, unfasten the injector connector by squeezing the two tabs together and pulling straight up.
  8.  
  9. On Model 300, remove the fuel metering cover.
  10.  



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Fig. Fig. 1: Remove the fuel metering cover to access the injector - TBI Model 300

  1. Remove the fuel injector retaining screw and retainer on Model 700.
  2.  



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Fig. Fig. 2: Remove the fuel injector retaining screw and retainer on Model 700

  1. Place a small prytool under the ridge opposite the electrical connector of the injector, and carefully pry it out.
  2.  



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Fig. Fig. 3: Place a small prytool under the ridge opposite the electrical connector of the injector, and carefully pry it out - Model 300 shown



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Fig. Fig. 4: Place a small prytool under the ridge opposite the electrical connector of the injector, and carefully pry it out - Model 700 shown

  1. Remove the two O-rings from the injector and discard them. Carefully rotate the injector fuel filter back and forth to remove the filter from the base of the injector.
  2.  


CAUTION
Do not remove the four screws securing the pressure regulator to the meter cover. The pressure regulator includes a large spring under heavy tension.

To install:
  1. Attach the filter to the injector, make sure the large end of the filter is facing the injector, so that the filter covers the raised rib at the base of the injector.
  2.  
  3. Lubricate the new O-rings with clean engine oil or transmission fluid, then place them on the injector. Make sure the upper O-ring is in the groove and the lower O-ring is up, flush against the filter.
  4.  
  5. If so equipped install the steel washer.
  6.  



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Fig. Fig. 5: The Model 300 TBI unit has steel washers, unlike the Model 700 TBI unit

  1. Install the fuel injector by positioning it in the throttle body with the electrical connector face cut-out for the wire grommet, then push the injector down to seat it in the cavity.
  2.  



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Fig. Fig. 6: Installing the fuel injector in Model 300. Push the injector down to seat it in the cavity

  1. Install the injector retainer.
  2.  
  3. Apply Loctite®262 or an equivalent to the threads of the injector. Then install the injector retainer screw.
  4.  
  5. Tighten the retainer screw.
  6.  
  7. Tighten the fuel filler cap, the connect the negative battery cable.
  8.  

 
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