Fuel Injected Engines

 WARNING: TANK-TO-INJECTOR FUEL INJECTION SUPPLY MANIFOLD REMAIN UNDER HIGH PRESSURE AFTER THE SYSTEM IS SHUT OFF. DEPRESSURIZE THE FUEL INJECTION SUPPLY MANIFOLD AT THE SCHRADER VALVE LOCATED ON THE ENGINE FUEL INJECTION SUPPLY MANIFOLD RAIL BEFORE DISCONNECTING ANY FUEL TUBE. DISCONNECTING FUEL TUBES WITHOUT DEPRESSURIZING THE SYSTEM AS DESCRIBED IN THIS SECTION CAN RESULT IN INJURY FROM FUEL BEING SPRAYED UNDER PRESSURE. ALSO, FUEL SPRAYED UNDER PRESSURE IS AN OBVIOUS FIRE HAZARD.

F-Series and Bronco vehicles are equipped with multiport fuel injection (MFI) engines (6007). Separate electronically controlled fuel injectors (9F593) are mounted in the intake manifold (9424) on the runner for each cylinder.

Each fuel injector is mounted so that it sprays fuel into the cylinder head intake port of its cylinder. The fuel injectors are supplied fuel under high pressure through an engine-mounted fuel injection supply manifold (9F792) which also has a fuel pressure regulator (9C968). The fuel pressure regulator controls the pressure of fuel going into the fuel injectors and returns excess fuel to the fuel tanks (9002).

For a description of the operation of the fuel injectors and fuel injection supply manifold, refer to Section 03-04A for 4.9L, Section 03-04B for 5.0L and 5.8L, or Section 03-04C for 7.5L.

On all vehicles, a fuel pump (9350) located in a fuel delivery module (FDM) in the fuel tank supplies fuel under high pressure to the fuel injection supply manifold.

All vehicles have an in-line fuel filter (9155) mounted on the frame rail under the vehicle.