Mechanics

CADILLAC DEVILLE FUEL PRESSURE PROBLEM

1999 Cadillac Deville • 150,000 miles

How do I change fuel regulator?
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Guest
January 24, 2013.



Relieve fuel system pressure. Refer to Fuel Pressure Relief Procedure.

Description

Remove the vacuum hose from the fuel pressure regulator.

Description

Clean any dirt from the fuel pressure regulator (6) retaining ring (3).
Remove the retaining ring (3).
Catch any spilled fuel using a shop towel.
Lift and twist the fuel pressure regulator (6) from the fuel rail socket.
Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system.
Clean the fuel pressure regulator filter screen (1) with gasoline.

INSTALLATION PROCEDURE

IMPORTANT: When servicing the fuel pressure regulator, insure that the small O-ring, large O-ring, filter screen, and O-ring backup are properly placed on the regulator.

Description

Install the new O-rings on the fuel pressure regulator, if a new fuel pressure regulator is not being installed.

1.1. Install the regulator seal O-ring (2) (small O-ring).
1.2. Install the regulator filter (1).
1.3. Install the regulator seal O-ring (4) (large O-ring).
1.4. Install the O-ring back-up (5).

Insert the regulator into the fuel rail socket using a turning motion to properly seat the O-rings.
Install the retaining ring (3) on the regulator (6).

Description

Install the vacuum hose to the fuel pressure regulator.

Intake Manifold Top Cover

Install the negative battery cable.
Turn the ignition switch ON for 2 seconds.
Turn the ignition switch OFF for 10 seconds.
Turn the ignition switch ON.
Check for fuel leaks.
Install the intake manifold top cover.

Tighten
Tighten the nuts to 3 N.M (27 lb in).

Refer to the Fastener Notice in Service Precautions.

Inspect for leaks.

ASEMaster6371
Jan 24, 2013.