Pontiac Fiero 1984-1988 Repair Guide

Fuel Rail Assembly

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REMOVAL & INSTALLATION





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Fig. Fig. 1 Use a wrench to loosen nut on the fuel line to the cold start injector ...



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Fig. Fig. 2 ... then gently pull the fuel line from the fuel rail



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Fig. Fig. 3 Disconnect the vacuum line from the fuel pressure regulator



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Fig. Fig. 4 Exploded view of the fuel rail assembly and its related components



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Fig. Fig. 5 Disengage the fuel injector electrical connector



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Fig. Fig. 6 Use a flare nut wrench to loosen the fuel line nut, then disengage the line from the fuel block



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Fig. Fig. 7 Remove the fuel rail retainers ...



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Fig. Fig. 8 ... then remove the fuel rail and injectors from the intake manifold assembly

An eight digit identification number is stamped on the side of the fuel rail. Refer to this number when servicing or replacing system components. When servicing the fuel rail assembly, be careful to prevent dirt and contaminants from entering the fuel passages. Always cap or plug the fittings during servicing.

  1. Relieve the fuel pressure.
  2.  
  3. Disconnect the negative (-) battery cable.
  4.  
  5. Remove the air duct and clamp.
  6.  
  7. Remove the air plenum assembly as outlined in the "Air Plenum" removal procedures in this section.
  8.  
  9. Remove the cold start valve line at the fuel rail fitting.
  10.  
  11. Remove the cold start tube O-ring seal and discard.
  12.  
  13. Remove the fuel inlet and return lines and O-ring seals.
  14.  


CAUTION
To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before servicing any fuel system component. If this procedure is not performed, fuel may be sprayed out of the connection under pressure. Always keep a dry chemical (Class B) fire extinguisher near the work area.

  1. Remove the vacuum line from the pressure regulator.
  2.  
  3. Disconnect the electrical connectors from the injectors.
  4.  
  5. Remove the fuel rail retaining bolts and carefully remove the fuel assembly.
  6.  

Use care in removing the fuel rail assembly to prevent damage to the injector electrical connector terminals and injector spray tips.

To install:

  1. Lubricate new injector O-rings at the each spray tip with automatic transmission fluid.
  2.  
  3. Install the fuel rail assembly into the intake manifold by tilting the rail so the injectors will slid into the injector holes.
  4.  
  5. Install the fuel rail attaching bolts and torque to 19 ft. lbs. (25 Nm).
  6.  
  7. Install the injector electrical connectors, vacuum connectors and fuel inlet and return with new O-rings. Torque the fittings to 88 inch.lb. (10 Nm).
  8.  
  9. Install the cold start valve and tube with new O-rings to the fuel rail fitting.
  10.  
  11. Install the air plenum as outlined in the "Air Plenum" installation procedures in this section.
  12.  
  13. Install the air duct and clamp. Reconnect the negative (-) battery cable.
  14.  
  15. Energize the fuel pump by turning the ignition switch to the ON position without the engine running and check for fuel, vacuum, and coolant leaks.
  16.  

 
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