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Home >> Buick >> 2004 >> Regal LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls 3.8L (Introduction, Service & Replacement) >> Repair Instructions >> Fuel Pressure Regulator Replacement >> Installation Procedure
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Installation Procedure

NOTE:
  • Do not use compressed air in order to test or clean a fuel pressure regulator as damage to the fuel pressure regulator may result.
  • Clean the fuel pressure regulator filter screen with gasoline if necessary.
  • Do not immerse the fuel pressure regulator in a solvent bath in order to prevent damage to the fuel pressure regulator.
    Fig 1: View Of Fuel Pressure Regulator
    GM12396Courtesy of GENERAL MOTORS CORP.
  1. Install the new O-rings on the fuel pressure regulator (6), if a new fuel pressure regulator is not being installed. Lubricate the O-rings lightly with clean engine oil.
  2. Install the regulator back up O-ring (5).
  3. Install the regulator O-ring large (4).
  4. Install the regulator O-ring small (2).
  5. Install the fuel pressure regulator (6) in the fuel pressure regulator housing (1).
  6. Install the snap ring (7).
    7. Fig 2: View Of Vacuum Line At Pressure Regulator
    GM155470Courtesy of GENERAL MOTORS CORP.
  7. Connect the vacuum line to the fuel pressure regulator.
  8. Tighten the fuel fill cap.
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  10. Inspect for leaks.
    1. Turn ON the ignition for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition.
    4. Inspect for fuel leaks.
  11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L36) or Fuel Injector Sight Shield Replacement (L67) in Engine Mechanical - 3.8L.
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