Fuel Pressure Pulsation Damper: Service and Repair

FUEL PRESSURE DAMPENER REPLACEMENT

TOOLS REQUIRED
SA9127E Gage Bar Set

REMOVAL PROCEDURE
1. Disconnect the negative battery cable.

CAUTION:
- Do not allow smoking or the use of open flames in the area where work on the fuel or EVAP system is taking place. Anytime work is being done on the fuel system, disconnect the negative battery cable, except for those tests where battery voltage is required.
- Refer to Battery Disconnect Caution in Service Precautions.




2. Disconnect the intake air temperature (IAT) sensor connector.
3. Loosen the clamp at the air cleaner assembly.
4. Remove the push pin attachment from the outlet resonator/duct assembly to support bracket.
5. Loosen the clamp at the throttle body assembly.
6. Disconnect the PCV fresh air vent hose at the cam cover.
7. Remove the outlet resonator/duct assembly.




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

CAUTION: Whenever fuel line fittings are loosened or disconnected, wrap a shop cloth around the fitting to collect fuel. Place the cloth in an approved container.

9. Disconnect the SA9127E after the pressure has been relieved.




10. Remove the fuel dampener bolts.
11. Remove the fuel pressure dampener and O-ring seals.
12. Visually inspect the seals for cuts, nicks, or flatness. Replace as necessary.

INSTALLATION PROCEDURE




1. Install the small oiled O-ring (4) into the fuel rail.

IMPORTANT: O-rings must be lubricated with clean engine oil and installed into the fuel rail before the fuel pressure regulator is installed.

2. Install the large oiled O-ring (7) into the fuel rail.




3. Install the fuel pressure regulator into the fuel rail.
4. Install the retaining bolts.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the fuel pressure dampener bolts to 5 N.m (44 lb in).




5. Install the outlet resonator/duct assembly into position.
6. Connect the PCV fresh air vent hose assembly.
7. Tighten the clamp at the throttle body assembly.
8. Position the outlet resonator/duct assembly up with a support bracket and install the push pin.
9. Tighten the clamp at the air cleaner assembly.
10. Connect the air intake temperature (IAT) sensor connector.
11. Connect the negative battery cable.

Tighten the battery terminal bolt to 17 N.m (13 lb ft).

12. Run the vehicle and inspect for leaks.