Fuel Charging and Controls

The fuel charging system consists of a supply manifold, a pressure regulator and four fuel injectors.

The supply manifold is a one-piece aluminium die casting with machined holes for the fuel pressure regulator and the fuel injectors. The supply manifold is retained to the engine by two bolts.

The pressure regulator is fitted directly into the supply manifold and is retained by two bolts. Sealing is achieved by means of an O-ring seal. The pressure regulator is of the vacuum operated, spring loaded diaphragm type and is designed to maintain a constant pressure in the supply manifold with excess fuel being returned to the fuel tank.

The fuel injectors are fitted directly into the supply manifold and are retained by the supply manifold when assembled to the intake manifold. Sealing is achieved by means of upper and lower O-ring seals. The fuel injectors are activated sequentially by the powertrain control module which modifies fueling by adjusting fuel injector opening times according to engine operating conditions.