OEM 2003 Ford Expedition Fuel Rail

2003 Ford Expedition Fuel Rail Parts Questions & Experts Answers

• Q: How to service and repair the Fuel Rail on 2003 Ford Expedition?

  A: Before working on the fuel injection supply manifold start by following safety measures which include preventing open flames and smoking in the area due to the presence of flammable mixtures. It is necessary to relieve fuel system pressure prior to unmounting any fuel lines or system components. Start the task with battery cable grounding removal then drain part of the cooling system fluid. Start by detaching the air cleaner outlet pipe before removing the accelerator control devices which consist of the accelerator cable together with the speed control cable alongside its return spring. The technician should remove electrical connectors from three elements: idle air control (IAC), throttle position (TP) sensor, exhaust gas recirculation (EGR) vacuum regulator solenoid. Unplug the vacuum tubing at both throttle body right sides in addition to the fuel pressure and EGR valve hoses and the evaporative emission hose that runs to the throttle body. First position the vacuum harness aside before removing the brake booster vacuum tube bracket nut to disconnect the vacuum tube. EGR tube fittings need removal followed by disconnecting and removing coolant hoses from the intake manifold. Start by removing the valve cover PCV valve then disconnect the PCV coolant hose before removing the throttle body adapter assembly by deleting its retaining bolts. The fuel tube spring lock coupling and the eight fuel injector electrical connectors can be disconnected after removing the four bolts to lift the fuel injection supply manifold and injector units out of the intake manifold. Service procedures on fuel injectors involve removing the components from their manifold position to check O-ring seals before application of fresh engine oil lubrication on new seals. First position fuel injectors into the fuel injection supply manifold before installing the manifold alongside reconnecting eight fuel injector electrical connectors followed by reconnection of the fuel tube spring lock coupling. Install the throttle body adapter bolts while reattaching the PCV coolant hose and then position the PCV valve before finishing with the throttle body adapter retaining bolts installation. The work sequence continues with installation of the intake manifold coolant hose then the EGR tube installation after connecting the brake booster vacuum tube. Place the vacuum harness before reinstalling the EGR vacuum regulator solenoid along with the EVAP canister purge solenoid. Reconnect the EGR vacuum hose along with the EVAP hose to the throttle body before proceeding with vacuum hose attachment and vacuum connection at the right side of the throttle body adjacent to the fuel pressure regulator. After reconnecting the electrical connector for EGR vacuum regulator solenoid you should also reconnect the same wires for throttle position (TP) sensor and idle air control (IAC). Then proceed with accelerator control assembly by reconnecting speed control cable and accelerator cable and return spring. After installing the air cleaner outlet pipe and bleeding and filling the cooling system you must reconnect the battery ground cable.