GM Camaro/Firebird 1993-1998 Repair Guide

Fuel Injectors

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REMOVAL & INSTALLATION



Use care in removing injectors to prevent damage to the electrical connector pins and the nozzle. The fuel injector is serviced as a complete assembly only. Since it is an electrical component, DO NOT immerse it in a cleaner.

3.4L Engine

See Figures 1, 2 and 3

  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the fuel rail assembly.
  6.  
  7. Rotate the injector retaining clip to the release position.
  8.  
  9. Remove the fuel injector. Discard the O-rings and the retaining clip.
  10.  



Click image to see an enlarged view

Fig. Fig. 1: Fuel injector mounting and retaining clip-3.4L engine

Different injectors are calibrated for different flow rates. When ordering new injectors, be sure to order the identical part number that is inscribed on the old injector.



Click image to see an enlarged view

Fig. Fig. 2: When installing new injectors, make sure to get the correct part

To install:

CAUTION
To reduce the risk of fire and personal injury, always install the injector O-rings in the proper position. If the upper and lower O-rings are different colors (black and brown), be sure to install the black O-ring in the upper position and the brown O-ring in the lower position. The O-rings are of the same size, but are made of different materials.

The fuel injector lower O-ring uses a nylon collar, called the O-ring backup, to properly position the O-ring on the injector. Be sure to install the O-ring backup, or the sealing O-ring may move on the injector when installing the fuel rail. This can result in a vacuum leak and driveability problems will occur.



Click image to see an enlarged view

Fig. Fig. 3: Cross-sectional view of a fuel injector for the 3.4L engine

  1. Lubricate the new O-ring seals with clean engine oil and install them on the injector.
  2.  
  3. Assemble a new retainer clip onto the injector.
  4.  
  5. Install the fuel injector into the fuel rail socket with the electrical connections facing outwards.
  6.  
  7. Rotate the injector retaining clip to the lock position.
  8.  
  9. Install the fuel rail assembly.
  10.  
  11. Tighten the fuel filler cap and connect the negative battery cable.
  12.  
  13. With the engine off, turn the ignition switch to the ON position for 2 seconds, then turn it to the OFF position for 10 seconds. Again turn it to the ON position and check for fuel leaks.
  14.  

3.8L Engine

See Figure 4

  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the fuel rail assembly.
  6.  

Different injectors are calibrated for different flow rates. When ordering new injectors, be sure to order the identical part number that is inscribed on the old injector.



Click image to see an enlarged view

Fig. Fig. 4: Exploded view of the fuel injector (3), retaining clip (2), O-rings (1 and 5) and back-ups (4)

To install:

CAUTION
To reduce the risk of fire and personal injury, always install the injector O-rings in the proper position. If the upper and lower O-rings are different colors (black and brown), be sure to install the black O-ring in the upper position and the brown O-ring in the lower position. The O-rings are of the same size, but are made of different materials.

The fuel injector lower O-ring uses a nylon collar, called the O-ring backup, to properly position the O-ring on the injector. Be sure to install the O-ring backup, or the sealing O-ring may move on the injector when installing the fuel rail. This can result in a vacuum leak and driveability problems will occur.

  1. Coat new fuel injector O-rings with clean engine oil.
  2.  
  3. Install the injector back-ups.
  4.  
  5. Install the fuel injector lower and upper O-rings.
  6.  
  7. Position the fuel injectors to the rail and secure with the retaining clips.
  8.  
  9. Install the fuel rail.
  10.  
  11. Connect the negative battery cable.
  12.  

5.7L Engine

See Figures 5 through 12

  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the fuel rail cover (if equipped) and rail assembly.
  6.  



Click image to see an enlarged view

Fig. Fig. 5: Remove the fuel rail from the vehicle and place it on a clean working surface

  1. For 1993 vehicles, spread the injector retaining clip to release the injector from the rail.
  2.  



Click image to see an enlarged view

Fig. Fig. 6: Spread the injector retaining clip, then remove the injector (A) and the clip (B) from the fuel rail

  1. For 1994-98 vehicles, rotate the injector retaining clip to release the injector.
  2.  
  3. Remove the fuel injector. Discard the O-rings and the retaining clip. Save the O-ring backup for use later.
  4.  



Click image to see an enlarged view

Fig. Fig. 7: Use a small tool to remove and discard the O-rings from the injector



Click image to see an enlarged view

Fig. Fig. 8: Exploded view of the fuel rail, injectors and pressure regulator-1993 5.7L engine



Click image to see an enlarged view

Fig. Fig. 9: Exploded view of the fuel rail, injectors and pressure regulator-1994-98 5.7L engine

Different injectors are calibrated for different flow rates. When ordering new injectors, be sure to order the identical part number that is inscribed on the old injector.



Click image to see an enlarged view

Fig. Fig. 10: Always make sure to get the proper part when replacing fuel injectors

To install:

CAUTION
To reduce the risk of fire and personal injury, always install the injector O-rings in the proper position. If the upper and lower O-rings are different colors (black and brown), be sure to install the black O-ring in the upper position and the brown O-ring in the lower position. The O-rings are of the same size, but are made of different materials.

The fuel injector lower O-ring uses a nylon collar, called the O-ring backup, to properly position the O-ring on the injector. Be sure to install the O-ring backup, or the sealing O-ring may move on the injector when installing the fuel rail. This can result in a vacuum leak and driveability problems will occur.

  1. Lubricate the new O-ring seals with clean engine oil and install them on the injector.
  2.  
  3. Assemble a new retainer clip onto the injector.
  4.  
  5. Install the fuel injector into the fuel rail socket with the electrical connections facing outwards.
  6.  



Click image to see an enlarged view

Fig. Fig. 11: Make sure the electrical connector is facing outward when installing the injector



Click image to see an enlarged view

Fig. Fig. 12: Install the injector into the rail socket and secure with the clip, or rotate to the locking position, as applicable

  1. Rotate the injector retaining clip to the locking position.
  2.  
  3. Install the fuel rail assembly.
  4.  
  5. Tighten the fuel filler cap and connect the negative battery cable.
  6.  
  7. With the engine OFF, turn the ignition switch to the ON position for 2 seconds, then turn it to the OFF position for 10 seconds. Again turn it to the ON position and check for fuel leaks.
  8.  

 
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