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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 402 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 3.8L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSFUEL PRESSURE REGULATOR REPLACEMENTINSTALLATION PROCEDURE
2008 Pontiac Grand Prix Base

Installation Procedure

2008 Pontiac Grand Prix BaseSECTION Installation Procedure
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
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: Exploded 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 Disconnection and Connection (L26) .
  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 .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.