Fuel Injected

Fig. 4 In-tank fuel pump assembly (Typical):

Fig. 5 High pressure fuel pump wiring circuit (Typical):

Fig. 6 Fuel pump inertia switch. Exc. 1984 Capri & Mustang (Typical):

All 1982---83 Models;
1984---85 Crown Victoria, Grand Marquis & Town Car; 1985 Continental & Mark VII; 1985---87 Cougar & Thunderbird; 1986 Capri & Mustang

The in-tank fuel pump, Fig. 4, is a high pressure unit capable of maintaining a working pressure of 39 psi and an over-pressure protection feature that opens an internal relief valve when pressure reaches 80---120 psi. The pump is protected at its inlet by a nylon filter that filters out dirt and contaminants which could damage the pump, while permitting passage of small quantities of water that may accumulate within the fuel tank sump.
The electrical system has a single fuel pump control relay, Fig. 5, controlled by the EEC module, which provides power to the fuel pump under various operating conditions.
When the ignition switch is off, the contacts of all three relays are open. When ignition switch is initially turned to ``On,'' the EEC power relay is energized, closing its contacts. Power is provided to both the fuel pump relay and EEC module. If ignition switch is not turned to ``Crank,'' the timing device in the EEC module will open the ground circuit after about one second and shut power off at the fuel pump. When ignition switch is turned to ``Crank'' position, the starter relay is energized supplying power to both starter motor and fuel pump. After engine starts and ignition switch is returned to the ``On'' position, power to fuel pump is again supplied through the resistance wire and fuel pump relay.
The EEC module senses engine speed and shuts off the pump by opening the EEC controlled relay when the engine stops, or speed is below 120 RPM.
In case of a collision, the inertia switch opens and shuts off the fuel pump even if the engine does not stop running. The engine will stop moments thereafter and cannot be restarted unless the switch is reset manually. On 1984---85 Crown Victoria Wagon and Grand Marquis Wagon the inertia switch is located in the left side storage compartment. On all other models, the inertia switch is located in the luggage compartment, Fig. 6. The inertia switch must not be reset until after the vehicle has been inspected for fuel leaks and the necessary repairs made.