Grand Marquis V8-4.6L VIN V Flex Fuel (2006)
Fuel Injector: Description and Operation
FUEL INJECTORS
Fuel Injectors
CAUTION: 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 12-volt VPWR from the electronic engine control power 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. However, it can be flow checked and, if found outside of
specification, a new fuel injector should be installed.