Fuel Pressure Accumulator

Fuel Pressure Accumulator

The fuel pressure accumulator is located on the end of the fuel rail. The accumulator is connected to the inlet manifold via a hose. The accumulator is the same item normally functioning as the pressure regulator in a feed and return system. In this system, no return line is fitted and the accumulator simply serves to damp out injector pulses and reduce injector noise. The rubber hose connecting the accumulator to the intake manifold must be connected at all times to prevent an intake manifold air leak.

Inertia Fuel Shut-Off (IFS) Switch

The Inertia Fuel Shut-off (IFS) switch is located in the engine compartment on the left hand side of the bulkhead. The switch incorporates a button, covered by a rubber shroud, which is used to reset the switch after operation.

The electrical circuit for the fuel pump incorporates the IFS switch, which in the event of a sudden deceleration, breaks the circuit to the fuel pump stopping fuel delivery to the engine. The switch must be reset by pressing the rubber top before the engine can be restarted.

WARNING: ALWAYS check for fuel leaks and the integrity of fuel system connections before resetting the switch.

Diagnostic Socket

The diagnostic socket is located in a bracket behind the centre console in the passenger footwell. The socket connector is constructed to ISO standard and allows the attachment of TestBook or any other ISO standard scantool. The diagnostic socket allows diagnostic information stored in any of the vehicle’s ECU’s to be retrieved. It also allows engine tuning and fault diagnosis to be carried out via the ECM.