Acura CL Integra NSX RL RSX TL TSX 2001-2006

Fuel Pressure Regulator

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Removal & Installation



2001-03 TL 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.
  2.  
  3. Install the fuel pressure regulator in the fuel joint. Turn it by hand until stops.

    Click image to see an enlarged view

    Fig. Fuel pressure regulator (D) and related components-2001-03 TL models

  4.  
  5. Turn the fuel pressure regulator (A) counterclockwise to set the angle as shown. Tighten the locking nut to 22 ft. lbs. (29 Nm).

    Click image to see an enlarged view

    Fig. Turn the fuel pressure regulator (A) counterclockwise to set the angle as shown-2001-03 TL models

  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.  

2001-04 RL Models
  1. Remove the strut bar.
  2.  
  3. Remove the engine cover.
  4.  
  5. Relieve fuel pressure, as outlined in this section.
  6.  
  7. Disconnect the vacuum hose and fuel return hose.
  8.  
  9. Loosen the locking nut, and remove the fuel pressure regulator.
  10.  
  11. Installation is the reverse of the removal procedure. Tighten the locking nut to 22 ft. lbs. (29 Nm).
  12.  

2004-06 TL Models
  1. Relieve the fuel system pressure, as outlined in this section.
  2.  
  3. Remove the fuel tank unit, as follows:
    1. Remove the fuel fill cap.
    2.  
    3. Remove the trunk floor.
    4.  
    5. Remove the access panel (A) from the floor.
    6.  
    7. Disconnect the fuel pump 5P connector (B).
    8.  
    9. Disconnect the quick-connect fitting (C) from the fuel tank unit.
    10.  
    11. Using the special tool, loosen the fuel tank unit locknut (A).

      Click image to see an enlarged view

      Fig. Use a fuel pump module locknut wrench to loosen the locknut (A)

    12.  
    13. Remove the locknut and fuel tank unit.
    14.  

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

To install:

  1. Install the parts in the reverse order of removal with a new O-ring (C). Make sure the regulator is installed with the drain hole (D) facing down.
    NOTE
    Coat the O-ring with clean engine oil.



    Click image to see an enlarged view

    Fig. Exploded view of the fuel pressure regulator (B) and related components

  2.  

2005-06 RL Models
  1. If the fuel tank is full, drain the fuel.
  2.  
  3. Relieve the fuel pressure, as outlined in this section.
  4.  
  5. Remove the rear seat cushion for RL models or the trunk floor for TL models
  6.  
  7. Remove the access panel (A) from the left side of the floor.
  8.  
  9. Disconnect the fuel pump electrical connector (B).
  10.  
  11. Disconnect the quick-connect fitting (C) from the fuel tank unit.

    Click image to see an enlarged view

    Fig. Remove the access panel (A), detach the connector (B), then detach the quick-connect fitting (C) from the fuel tank unit-2005-06 RL models

  12.  
  13. Remove the fuel tank unit (A), and disconnect the transfer tube (B).

    Click image to see an enlarged view

    Fig. Remove the fuel tank unit (A), and disconnect the transfer tube (B)

  14.  
  15. Remove the strainer case (A), the fuel gauge sending unit (B), the wire harness (C) and the fuel pressure regulator (D).

    Click image to see an enlarged view

    Fig. Remove the strainer case (A), the fuel gauge sending unit (B), the wire harness (C) and the fuel pressure regulator (D)

  16.  

To install:

  1. Install the regulator in the reverse order of removal with a new O-ring (B). Coat the O-ring with clean engine oil before installing it.

    Click image to see an enlarged view

    Fig. Install the fuel pressure regulator (A) with a new O-ring (B)-2005-06 RL models

  2.  
  3. Install the fuel tank unit in the reverse of the removal procedure.
  4.  

CL And Integra Models

CAUTION
Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.



Click image to see an enlarged view

Fig. Cross-sectional views of the fuel pressure regulator in both the open and closed positions

  1. Properly relieve the fuel system pressure.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Detach the vacuum hose and fuel return hose from the fuel pressure regulator.
  6.  
  7. Unfasten the fuel pressure regulator retaining bolts and/or nuts.
  8.  
  9. Remove the fuel pressure regulator and the O-rings. Discard the O-rings.

    Click image to see an enlarged view

    Fig. Vacuum hose (A), fuel return hose (B), locking nut (C), fuel pressure regulator (D) and O-ring (E)-CL models

  10.  

To install:

  1. Lubricate the new O-rings with a light engine oil.
  2.  
  3. Position a new O-rings onto the fuel pressure regulator.
  4.  
  5. Place the fuel pressure regulator into position and install the retainers.
  6.  
  7. Attach the vacuum line and fuel line to the fuel pressure regulator.
  8.  
  9. Connect the negative battery cable.
  10.  
  11. Run the engine at idle for 2 minutes, then turn the engine OFF and check for fuel leaks and proper operation.
  12.  

NSX Models
  1. Place a shop towel under fuel pressure regulator, then relieve fuel pressure as outlined in this section.
  2.  
  3. Disconnect the vacuum hose and fuel return hose.
  4.  
  5. Remove the two 6 mm retainer bolts, then remove the fuel pressure regulator.
  6.  

To install:

  1. Install the fuel pressure regulator in the reverse order of removal, and note these items:
    1. Replace the O-ring.
    2.  
    3. Apply clean engine oil to the O-ring and assemble it into its proper position, taking care not to damage the O-ring.
    4.  

  2.  

RSX Models
  1. Relieve the fuel system pressure, as outlined in this section.
  2.  
  3. Remove the fuel pump, as outlined in this section.
  4.  
  5. On 2005-06 models, remove the terminal and clip
  6.  
  7. Remove the fuel pressure regulator.
  8.  
  9. Install the regulator in the reverse order of removal with a new O-ring.

    Click image to see an enlarged view

    Fig. Fuel pressure regulator (A) and O-ring (B)-2002-04 RSX



    Click image to see an enlarged view

    Fig. Fuel pressure regulator terminal (A), clip (B), regulator (C) and O-ring (D)-2005-06 RSX

  10.  

TSX Models
  1. Relieve the fuel system pressure, as outlined in this section.
  2.  
  3. Remove the fuel tank unit, as follows:
    1. Remove the fuel fill cap.
    2.  
    3. Remove the spare tire cover.
    4.  
    5. Remove the access panel (A) from the floor.
    6.  
    7. Disconnect the fuel pump 5P connector (B).
    8.  
    9. Disconnect the quick-connect fitting (C) from the fuel tank unit.
    10.  
    11. Using the special tool, loosen the fuel tank unit locknut (A).

      Click image to see an enlarged view

      Fig. Use a fuel pump module locknut wrench to loosen the locknut (A)

    12.  
    13. Remove the locknut and fuel pump module.
    14.  

  4.  
  5. Remove the clip (A).
  6.  
  7. Remove the fuel pressure regulator (B).
  8.  

To install:

  1. Install the parts in the reverse order of removal with new O-rings (C).
  2.  
  3. Make sure the regulator is installed with the drain hole (D) facing down.
    NOTE
    Coat the O-ring with clean engine oil.



    Click image to see an enlarged view

    Fig. Exploded view of the fuel pressure regulator (B) and related components-2003-06 2.4L non-SULEV engine

  4.  

 
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