Fuel Tank: Description and Operation

Fuel Tank:

The steel fuel tank is located inside the trunk and mounted across the vehicle behind the passenger compartment bulkhead. The fuel tank is held in position by two retaining straps fitted to body-mounted brackets.

The fuel tank has an integral non-adjustable filler pipe and integral breather and vapor pipework.

A single fuel pump is mounted inside the tank on vehicles with normally aspirated engines. For vehicles with supercharged engines, two pumps are fitted in the tank. Fuel is drawn by the pump(s) from the fuel tank and supplied via the fuel lines and 70 micron filter to the fuel rails.

The fuel lines run from front-to-rear down the vehicle's left-hand-side.

Filler Cap and Pipe
The fuel filler cap with bayonet-type fixing is located beneath a remote-release spring-latched lid on the rear saddle panel on the left-hand-side of the vehicle.

Fuel Pump
The fuel pump(s) is energized by an ECM controlled relay. Fuel is drawn by this pump and supplied to the fuel injectors via the fuel line, filter and fuel rails.

Servicing of the fuel pump requires fuel tank removal.

Evaporative Loss Flange Assembly
The evaporative-loss flange assembly is mounted centrally on top of the tank. The flange assembly consists of a removable steel cap which mounts the evaporative emissions system vapor outlet valves and, if applicable, a pressure sensor. The external electrical supply to the fuel pump(s) is also made via a connector on the flange.

The flange assembly is fixed to the tank by a locking ring which is turned using special tool JD-174. A seal is fitted between the flange assembly and the tank. Three different flange assemblies are applicable according to the evaporative emission system fitted to the vehicle. The flange size and fixing are identical for the three systems, as described.

Removal of the evaporative flange assembly is necessary to gain access to the fuel pump(s) and other internal components. To remove the evaporative flange assembly the fuel tank must first be removed.

Fuel Return
Excess fuel is directed back to the fuel tank via a return line.

Fuel Pump Relay
The fuel pump relay, under control of the ECM, switches power to the fuel pump motor.

Inertia Fuel Shutoff (IFS) Switch
The IFS switch is located in the right-hand side footwell behind the footboard carpet. When activated the switch isolates the ignition system and fuel pump, releases any locked doors and disables unnecessary electrical systems. The system can be reset by pressing down the flexible cover on the top of the switch.


NOTE: The doors will not unlock if the IFS switch is tripped when the ignition switch is in position 'O'.