F 550 2WD Super Duty V10-6.8L (2009)
Fuel Injector: Description and Operation
Engine Control Components
Fuel Injectors
Note: Do not apply battery positive voltage (B+) directly to the fuel injector electrical connector terminals. The solenoids may be damaged internally in
a matter of seconds.
The fuel injector is a solenoid-operated valve that meters fuel flow to the engine. The fuel injector is opened and closed a constant number of times per
crankshaft revolution. The amount of fuel is controlled by the length of time the fuel injector is held open.
The fuel injector is normally closed, and is operated by a 12-volt source from either the electronic engine control (EEC) power relay or fuel pump relay.
The ground signal is controlled by the PCM.
The injector is the deposit resistant injector (DRI) type and does not have to be cleaned. Install a new fuel injector if the flow is checked and found to be
out of specification.
Typical Fuel Injector
Typical Fuel Injector (Part 1)
Typical Fuel Injector (Part 2)
