Removal Procedure
- Relieve the fuel system pressure. Refer to
Fuel Pressure Relief
in Engine Controls.
- Remove the upper intake
manifold assembly. Refer to
Upper Intake Manifold Replacement
in Engine Mechanical-4.3L.
- Remove the fuel pressure regulator retainer clip (5).
- Pull and twist the fuel pressure regulator (6) in order to remove
the fuel pressure regulator from the fuel pressure regulator housing using
a shop towel to catch any spilled fuel.
- Remove the regulator seal lower O-ring (3).
- Remove the regulator assembly filter (2).
- Remove the regulator seal upper O-ring (1).
- Remove the regulator seal backup ring (7).
- Discard the O-rings.
Installation Procedure
Important: If the fuel pressure regulator is to be reinstalled, inspect the filter
screen for contamination. If the filter screen is contaminated, replace
the regulator.
- Lubricate the new O-rings
with clean engine oil.
- Install the regulator seal backup ring (7).
- Install the regulator seal upper O-ring (1).
- Install the regulator assembly filter (2).
- Install the regulator seal lower O-ring (3).
- Assemble the regulator (6) with the vacuum tube pointing down
into the regulator retainer clip.
- Install the fuel pressure regulator retainer clip (5).
- Install the upper manifold assembly. Refer to
Upper Intake Manifold Replacement
in Engine Mechanical-4.3L.
- Connect the negative battery cable.
- Inspect for leaks.
10.1. | Turn ON the ignition, with the engine OFF, for 2 seconds. |
10.2. | Turn OFF the ignition for 10 seconds. |
10.3. | Turn ON the ignition, with the engine OFF. |
10.4. | Inspect for fuel leaks. |
- Install the engine cover. Refer to
Engine Cover Replacement
in Interior Trim.