Fuel Injected

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

Fig. 7 Low pressure in-tank fuel pump assembly. Capri & Mustang:

Fig. 8 Low pressure in-tank fuel pump assembly. Exc. Capri & Mustang:

Fig. 9 High pressure inline electric fuel pump assembly:

Fig. 10 Low pressure fuel pump wiring circuit (Typical):

Fig. 11 Fuel pump inertia switch. 1984 Capri & Mustang:

1984 Continental, Cougar, Mark VII & Thunderbird; 1984-85 Capri & Mustang; 1984-86 LTD & Marquis

The electric fuel pump system uses a low pressure in-tank mounted electric fuel pump and an externally mounted high pressure inline electric fuel pump, Figs. 7 through 9.
The low pressure electric fuel pump provides pressurized fuel to the inlet of the high pressure pump. The inlet of the low pressure pump has a nylon filter to prevent dirt and other foreign particles from entering the system. The low pressure pump has an external resistor in the electrical circuit to reduce operating voltage to 11 volts.
The externally mounted high pressure pump is capable of maintaining a working pressure of 39 psi and has an over-pressure protection feature that opens an internal relief valve when pressure reaches 138 psi.
The electrical system has a fuel pump control relay controlled by the EEC module, which provides power to the fuel pump under various operating conditions, Fig. 10.
When ignition switch is in the ``Off'' position, contacts of EEC power and fuel pump relays are open. When ignition switch is first turned to the ``On'' position, the EEC power relay is energized, closing its contacts. Power is provided to both fuel pump relay and to a timing device in the EEC module. If ignition switch is not turned to the ``Crank'' position, a timing device in the EEC module will open the ground circuit and shut power off to the fuel pump. When ignition switch is turned to the ``Crank'' position, the EEC module operates fuel pump relay to provide fuel for starting engine while cranking. After engine starts and ignition switch is returned to the ``On'' position, power to fuel pump is supplied to fuel pump relay.
The EEC module senses engine speed and shuts off the pump by opening the EEC control relay when engine stops, or speeds 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 Mustang and Capri Hatchback models, the inertia switch is located in the lefthand corner of the spare tire well, Fig. 11. On 1985---86 Capri and Mustang Hatchback models, the switch is located near the lefthand tail lamp. On all other models, the switch is located in the luggage compartment, Fig. 6.