626 1999-2001

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation




CAUTION
Fuel injection systems remain under pressure after the engine has been turned OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Failure to do so may result in fire or personal injury. Do not allow fuel spray or fuel vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher nearby. Never store fuel in an open container due to risk of fire or explosion.

2.0L (Fs) Engine

Specific to:

Mazda 626 1999-2002

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Refer to the illustration for component location and torque specifications.
  4.  
  5. Relieve the fuel system pressure.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Fuel injector wiring harness
     
    Fuel lines at the fuel rail
     
    Hose from the pressure regulator
     
    Fuel rail with the injectors attached
     
    Fuel injectors, grommets and O-rings from the fuel rail
     
    O-rings from the fuel injectors

    Click image to see an enlarged view

    Fig. Exploded view of the fuel rail and injector assembly-626 2.0L (FS)

     

  8.  

To install:

  1. Install or connect the following:

    New O-rings and grommets lubricated with engine oil on the fuel injectors.
     
    Insulators and injectors on the intake manifold
     
    Grommets and the fuel rail onto the injectors. Torque the bolts to 14-18 ft. lbs. (19-25 Nm).
     
    Fuel lines to the fuel rail
     
    Fuel injector wiring harness
     
    Negative battery cable
     

  2.  
  3. Turn the ignition switch ON to pressurize the fuel system.
  4.  
  5. Check for leaks and correct as necessary, before starting the engine.
  6.  

2.5L (Kl) Engine

Specific to:

Mazda 626 1999-2002

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Fuel injector wiring harness
     
    Fuel lines at the fuel rail
     
    Fuel rail
     
    Accumulated connector
     
    Spacer
     
    Fuel injectors, grommets and O-rings from the fuel rail
     
    O-rings from the fuel injectors

    Click image to see an enlarged view

    Fig. Exploded view of the fuel rail and injector assembly-626 2.5L (KL) engine

     

  6.  

To install:

  1. Install or connect the following:

    New O-rings and grommets lubricated with engine oil on the fuel injectors. Fit the injector squarely into the rail while using a twisting motion. Fit the injector tab into the notch on the rail.
     
    Insulators and injectors on the intake manifold
     
    Grommets and the fuel rail onto the injectors. Torque the bolts to 14-18 ft. lbs. (19-25 Nm).
     
    Fuel lines to the fuel rail
     
    Fuel injector wiring harness
     
    Negative battery cable
     

  2.  
  3. Turn the ignition switch ON to pressurize the fuel system.
  4.  
  5. Check for leaks and correct as necessary, before starting the engine.
  6.  

 
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