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Home >> Ford >> 2002 >> Crown Victoria Base, 4.6 9 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Engine Removal, Overhaul & Installation - Crown Victoria - NGV >> Fuel Systems >> Fuel Rails & Injectors >> Removal & Installation

Removal & Installation

  1. Remove air inlet tube(s) as necessary. Release fuel pressure from fuel lines. See COMPRESSED NATURAL GAS FUEL LINE VENTING  . On bi-fuel vehicles, release fuel system pressure from gasoline system. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - CROWN VICTORIA, GRAND MARQUIS & TOWN CAR - GASOLINE article. On all models, disconnect negative battery cable. On CNG vehicles, go to next step.
  2. Disconnect fuel inlet and return lines. See FUEL LINE FITTINGS  . Disconnect wiring harness connectors from injectors and fuel shutoff solenoid. Remove fuel rail bolts. Remove fuel rails and injectors as an assembly. Go to next step.
  3. On all vehicles, disconnect the accelerator and speed control cable. Disconnect Engine Coolant Temperature (ECT) sensor. Disconnect generator wiring. Disconnect Throttle Position (TP) sensor. Remove bolts retaining ignition coils and remove ignition coils. On bi-fuel vehicles, remove CNG or LPG fuel injection supply manifold and fuel injector sleeves.
  4. On all vehicles, install NEW "O" rings onto fuel injectors. Lightly lubricate "O" rings with clean engine oil. DO NOT use silicone-based lubricant. To complete installation, reverse removal procedure. Ensure injectors and/or injector sleeves are properly seated. Tighten fuel rail bolts to specification. See TORQUE SPECIFICATIONS  .
  5. After installation is completed, pressurize fuel system and inspect fuel lines and fittings for leaks. Perform appropriate leak test under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - EEC-V - NGV article.
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