Question about 2003 Oldsmobile Alero

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Fuel Pressure Regulator Leaking

Is it difficult to replace the fuel pressure regulator ? It is on the left front of my 4 cylinder engine on my Alero. Anything that I should be aware of before I attempt to remove this device ?

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  • Anonymous Mar 16, 2014

    fuel pressure regulator

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Make sure engine is turned off, unplug the hose slowly and make sure there is no fuel pressure, you will have a little bit of gas leak but not much. Unlossen the bolt with torx head bit screw driver or driver, pull it off all the way. Once you got that one bolt off, push down on the locking clip that attaches your fuel regulator to manifold. Twist off the old pressure regulator and then install the new one in. Make sure you check the box your regulator came in, and look for the packaged o-ring. Its that simple. I just replaced mine in my 2001 alero, took more time analyzing how to pull the old one off. Hope this will help you.

Posted on Jan 04, 2009

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Be sure to relieve fuel pressure first or it will spray all over.
After removed, make sure to remove the very small O ring from inside the fuel rail. Many times this is overlooked and will cause problem during installation. Lube the new regulator's O rings lightly with silicone grease. Tech JK
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Posted on Jan 04, 2009

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Removal & Installation

4.2L Engine

  1. Relieve the fuel system pressure.
  2. Remove the air cleaner outlet resonator.
  3. Disconnect the engine wiring harness from the retaining clips at the front of the engine.
  4. Disconnect the fuel pressure regulator vacuum line.
  5. Clean any dirt from the fuel pressure regulator and the surrounding area.
  6. Disconnect the fuel return pipe.
  7. Remove the fuel return pipe retainer.
  8. Remove the fuel pressure regulator retainer.
  9. Remove the fuel pressure regulator.
  10. Inspect the regulator filter screen for contamination. If contaminated, replace the fuel pressure regulator.

To install:
  1. Install the regulator filter.
  2. Install the new O-ring on the fuel pressure regulator.
  3. Lubricate the fuel pressure regulator O-ring with clean engine oil.
  4. Push the fuel pressure regulator into the regulator housing on the fuel rail.
  5. Install the fuel pressure regulator retainer. Tighten the regulator retainer screw to 71 inch lbs. (8 Nm).
  6. Install the fuel return pipe retainer. Tighten the return pipe retainer screw to 71 inch lbs. (8 Nm).
  7. Connect the fuel return pipe.
  8. Connect the fuel pressure regulator vacuum line.
  9. Connect the negative battery cable.
  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 engine wiring harness into the retaining clips at the front of the engine.
  12. Install the air intake resonator.

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