LS400 1990-1997

Fuel Pressure Regulator

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Removal & Installation



  1. Remove fuel pump assembly from fuel tank
  2.  
  3. Remove fuel pressure regulator
    1. Remove the screw, fuel filter and fuel pressure regulator.
    2.  
    3. Remove the O-rings from fuel pressure regulator and fuel filter.

      Click image to see an enlarged view

      Fig. Fuel pressure regulator component (1 of 2)



      Click image to see an enlarged view

      Fig. Fuel pressure regulator component (2 of 2)

    4.  

  4.  

To install:

  1. Install fuel pressure regulator
    1. Apply a light coat of gasoline to 2 new O-rings, and install them to the pressure regulator.
    2.  
    3. Insert the pressure regulator into the fuel filter by hand completely.
    4.  
    5. Insert the pressure regulator and fuel filter assembly into the delivery pipe by hand completely.
    6.  
    7. Check that the fuel pressure regulator and fuel filter rotate smoothly
      NOTE
      If it does not rotate smoothly. the O-ring may be pinched, so remove the pressure regulator, fuel filter and do steps (a) and (b) above again.

    8.  
    9. Install the screw. Tighten screw to 17 inch lbs. (2.0 Nm)
    10.  

  2.  
  3. Install fuel pump assembly to fuel tank
  4.  

 
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