System Overview

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Avoid contact with fuel during a visual inspection for fuel leaks with the engine running. Do not work on the fuel system until the pressure has been released and the engine has cooled. Fuel in the high-pressure fuel system is hot and under very high pressure. High-pressure fuel may cause cuts and contact with hot fuel may cause burns. Failure to follow these instructions may result in serious personal injury.

WARNING: Contact with exposed fuel injector wiring, if energized, may result in electric shock. Use care when working on or around energized fuel injector wiring. Fuel injector wiring supplies high voltage to operate the fuel injectors. Failure to follow this instruction may result in serious personal injury.

NOTE: Before disconnecting any part of the fuel system, it is important that all dust, dirt and foreign material is removed from around components to prevent ingress of foreign matter into the fuel system or the vehicle may be damaged.

NOTE: The fuel tubes between the pump and the fuel rail, and the fuel rail and the injectors, must be discarded after each use and new tubes installed or the vehicle may be damaged.

NOTE: It is essential that absolute cleanliness is observed when working with these components. Always install Fuel System Caps to any open orifice or tubes, or the vehicle may be damaged.

NOTE: Make sure that the workshop area in which the vehicle being worked on is as clean and dust-free as possible. Areas in which work on clutches, brakes or where welding or machining are carried out are not suitable due to the risk of contamination to the fuel system. Failure to follow this instruction may result in damage to the vehicle.

NOTE: Use a steel-topped work bench or cover it with clean, lint-free, non-flocking material. Failure to follow this instruction may result in damage to the vehicle.

NOTE: Do not attempt to apply battery voltage to the fuel injector or damage to the fuel injector will occur.

NOTE: The PCM is programmed with an IQA code for each fuel injector. The cylinder location of each fuel injector must be recorded.

The high-pressure common rail fuel system used on the 6.7L direct injection turbocharged diesel engine is controlled electronically by the PCM. Piezo-actuated fuel injectors deliver the high-pressure fuel. The injection parameters are:

Injection pressure
Number of injections per combustion cycle
Timing of injections
Injection quantity

These parameters are utilized for each injection phase within the combustion cycle. This system uses pre-injection (pilot), main-injection and post-injection to meet the following engine operating criteria:

Engine system emissions
Combustion noise reduction
Engine performance