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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Fuel Charging System & Fuel Control System - 4.6L (3V)) >> Removal And Installation >> Fuel Rail >> Removal And Installation

Removal And Installation

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
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.

All vehicles 

  1. Release the fuel system pressure. For additional information, refer to FUEL SYSTEM - GENERAL INFORMATION article.
  2. Disconnect the battery ground cable. For additional information, refer to BATTERY, MOUNTING AND CABLES article.

    3. Bullitt vehicles 

  3. Remove the 4 nuts and the strut tower cross brace.
    • To install, tighten to 35 Nm (26 lb-ft).
    4. Fig 1: Locating Strut Tower Cross Brace & Nuts
    GF0046320Courtesy of FORD MOTOR CO.

    All vehicles 

  4. Disconnect the fuel supply tube spring lock coupling. For additional information, refer to FUEL SYSTEM - GENERAL INFORMATION article.
  5. Detach the 2 wiring harness retainers from the fuel rail stud bolts and position the harness aside.
  6. Disconnect the fuel rail pressure and temperature sensor vacuum hose retainer from the fuel rail stud bolt.
  7. Disconnect the fuel rail pressure and temperature sensor electrical connector and vacuum hose.
  8. Disconnect the 8 fuel injector electrical connectors.
  9. Remove the 4 fuel rail stud bolts.
    • To install, tighten to 10 Nm (89 lb-in).
  10. Remove the fuel rail and fuel injectors as an assembly from the intake manifold.
    11. NOTE: The fuel injector clip can be reused if it is not damaged during removal. If the clip is reused, the 2 sides of the clip should be squeezed back into shape by placing it between index finger and thumb.
  11. Remove the retaining clips and fuel injectors from the fuel rail.
    12. CAUTION: Use O-ring seals that are made of special fuel-resistant material. Use of ordinary O-ring seals may cause the fuel system to leak. Do not reuse the O-ring seals.
  12. Remove and discard the fuel injector O-ring seals.
  13. To install, reverse the removal procedure.
    • Lubricate the new upper and lower fuel injector O-ring seals with clean engine oil prior to installation.
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