Navigator 4WD V8-5.4L (2010)
Fuel Rail: Service and Repair
Fuel Rail
Fuel Rail
Removal and Installation
WARNING: Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component.
Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.
WARNING: Before working on or disconnecting any of the fuel tubes or fuel system components, relieve the fuel system pressure to prevent
accidental spraying of fuel. Fuel in the fuel system remains under high pressure, even when the engine is not running. Failure to follow this
instruction may result in serious personal injury.
NOTICE: Fuel injection equipment is manufactured to very precise tolerances and fine clearances. It is therefore essential that absolute
cleanliness is observed when working with these components. Always install blanking plugs to any open orifices or tubes.
NOTICE: When reusing liquid or vapor tube connectors, make sure to use compressed air to remove any foreign material from the connector
retaining clip area before separating from the tube.
1. Disconnect the battery ground cable. For additional information, refer to Battery.
2. Remove the Air Cleaner (ACL) outlet pipe. For additional information, refer to Fuel Delivery and Air Induction.
3. Disconnect the crankcase ventilation tube quick connect coupling from the ACL outlet pipe-to-Throttle Body (TB) adapter. For additional
information, refer to Fuel Delivery and Air Induction.
4. Release the clamp and remove the bolt and the air intake resonator assembly.
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To install, tighten to 10 Nm (89 lb-in).
5. Remove the 3 ACL outlet pipe-to-TB adapter bolts.
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To install, tighten to 10 Nm (89 lb-in).
6. Remove the ACL outlet pipe-to- TB adapter.
7. Disconnect the Electronic Throttle Control (ETC) electrical connector.
8. Disconnect the Throttle Position (TP) sensor electrical connector.
9. Disconnect the Evaporative Emission (EVAP) tube quick connect coupling from the intake manifold. For additional information, refer to Fuel
Delivery and Air Induction.
10. Disconnect the fuel tube quick connect coupling. For additional information, refer to Fuel Delivery and Air Induction.
11. Disconnect the 8 fuel injector electrical connectors.
12. Remove the 4 fuel rail bolts and the fuel rail and injectors as an assembly.
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To install, tighten to 10 Nm (89 lb-in).
