Acura_MDX_2001-2006

Fuel Pressure Regulator

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Removal & Installation



2001-02 Models
  1. Place a shop towel under the fuel pressure regulator, then relieve fuel pressure as outlined in this section.
  2.  
  3. Disconnect the vacuum hose (A) and fuel return hose (B).
  4.  
  5. Loosen the locking nut (C), and remove the fuel pressure regulator (D).
  6.  

To install:

  1. Apply clean engine oil to a new O-ring (E), and carefully install it into its proper position. Install the fuel pressure regulator in the fuel joint. Turn it by hand until stops.

    Click image to see an enlarged view

    Fig. View of the vacuum hose (A), return hose (B), locking nut (C), fuel pressure regulator (D) and O-ring (E)

  2.  
  3. Turn the fuel pressure regulator (A) counterclockwise to set the angle as shown. The locking nut to 22 ft. lbs. (29 Nm).
    NOTE
    Replace the O-ring.



    Click image to see an enlarged view

    Fig. Turn the fuel pressure regulator (A) counterclockwise to set the angle as shown

  4.  
  5. When assembling the fuel pressure regulator, apply clean engine oil to the O-ring and assemble it into its proper position, taking care not to damage the O-ring.
  6.  
  7. Reconnect the vacuum hose and fuel return hose.
  8.  
  9. Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for about 2 seconds, the fuel pressure in the fuel line rises. Repeat this 2 or 3 times, then check whether there is any fuel leakage.
  10.  

2003-06 Models
  1. Remove the fuel tank unit, as follows.
    NOTE
    Fuel tank unit removal requires the use of a Fuel Sender Wrench, special tool no. 07AAA-S0XA100 or equivalent.

    1. Turn the ignition switch OFF.
    2.  
    3. Remove the driver's side second row seat.
    4.  
    5. Cut the carpet at the dotted line (A). Be careful not to cut the wire harness under the carpet.

      Click image to see an enlarged view

      Fig. Cut the carpet on the dotted line (A). Do NOT cut the wire harness under the carpet

    6.  
    7. Remove the access panel from the floor, then disconnect the fuel pump 5P connector.
    8.  
    9. Remove the fuel fill cap.
    10.  
    11. Relieve fuel pressure.
    12.  
    13. Disconnect the quick-connect fitting from the fuel tank unit.
    14.  
    15. Using the special tool, loosen the fuel tank unit locknut (A).

      Click image to see an enlarged view

      Fig. Use the special tool to loosen the fuel tank unit locknut (A)-2003-06 models

    16.  
    17. Remove the locknut (A) and fuel tank unit (B).

      Click image to see an enlarged view

      Fig. View of the locknut (A), fuel tank unit (B), alignment marks (C), fuel tank (D)

    18.  

  2.  
  3. Remove the clip (A).
  4.  
  5. Remove the fuel pressure regulator (B).
  6.  

To install:

  1. Install the regulator in the reverse order of removal with new O-rings (C).

    Click image to see an enlarged view

    Fig. View of the clip (A), fuel pressure regulator (B) and O-rings (C)-2003-06 models

  2.  
  3. Align the marks (C) on the fuel tank (D) and the fuel tank unit, then install the fuel tank unit in the reverse order of removal with a new gasket (E).
  4.  
  5. Install the fuel tank in the reverse of the removal procedure.
  6.  

 
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