1. Relieve the Bi-fuel system fuel pressure. For additional information, refer to Pressure Relief—Natural Gas Bi-Fuel System. 2. Raise the vehicle on the hoist. For additional information, refer to Section 100-02. 3. NOTE: There is an O-ring attached to the drain plug. The O-ring must be replaced each time the drain plug is removed. Remove the drain plug. 4. Install the drain plug. 5. Lower the vehicle. 6. Pressurize the fuel system. WARNING: It is important that your bi-fuel vehicle be correctly maintained by Ford bi-fuel trained personnel. If a concern occurs, it is important that correctly trained personnel diagnose the cause. If a concern relates to the fuel system, correct part replacement is imperative to keep your vehicle operating at normal performance. Bi-fuel components and gasoline specific components are not interchangeable. If your vehicle is not serviced in accordance with bi-fuel service procedures, damage can occur and your warranty may be invalidated. WARNING: Fuel supply lines are always pressurized. When servicing fuel related components, do not smoke or carry lighted tobacco or an open flame of any type. Flammable mixtures may be present and can ignite, resulting in personal injury. WARNING: The natural gas fuel system is always pressurized to 655 kPa (95 psi) downstream of the fuel pressure regulator and up to 24821 kPa (3,600 psi) upstream of the fuel pressure regulator. Use care when servicing the fuel system or personal injury can occur. WARNING: The natural gas fuel supply manifold is pressurized to 655 kPa (95 psi). Fuel pressure must be relieved prior to any fuel system service. WARNING: The fuel system pressure must be relieved before any component can be removed. The fuel tanks must be evacuated prior to tank removal. Removal of components without pressure relief or tank evacuation can cause natural gas to escape into the air and cause injury or death.
Removal All vehicles WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury. WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before working on or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved. Failure to follow these instructions may result in personal injury. 1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 . 2. Relieve the fuel pressure. For additional information, refer to Section 310-00A (Gasoline) or Section 310-00B (Natural Gas). 3. Disconnect the fuel lines. For additional information, refer to Section 310-00A (Gasoline) or Section 310-00B (Natural Gas). 4. Remove the throttle body (9E926). For additional information, refer to Throttle Body in this section. 5. On gasoline engines, remove the EGR valve to exhaust manifold tube (9D477). For additional information, refer to Section 303-08 . 6. Remove the drive belt (8620). For additional information, refer to Section 303-05 . Vehicles equipped with natural gas engines 7. Disconnect the fuel temperature sensor connector. 8. Disconnect the fuel pressure sensor connector. All vehicles 9. Disconnect the main fuel shut-off solenoid connector. 10. Disconnect the generator cable, electrical connector, and harness pin-type retainer. 11. Remove the bolts and the generator mounting bracket (10153). 12. Remove the bolts. 13. Unclip the accelerator cable (9A758) and the speed control actuator cable (9A825) from the two crash brackets and position out of the way. 14. Separate the LH heated oxygen sensor and the transmission electrical connector from the bracket at the rear of the cylinder head. 15. Separate the fuel charging wiring pin-type retainer from the crash bracket. 16. Remove the wiring bracket. * Disconnect the wiring connectors. * Separate the transmission harness from the stud. * Remove the nut and the bolt and remove the bracket 17. NOTE: On natural gas vehicles, there are no EGR vacuum connections. Disconnect the vacuum lines and position out of the way. 18. Remove bolt and stud and remove the crash bracket. 19. Disconnect the ground connector from the RH rear stud. 20. Disconnect generator harness locator retainer from LH front stud. 21. Disconnect the eight fuel injector electrical connectors