Central Fuel Injection - CFI

Throttle Body:

This engine is a high pressure Central Fuel Injection system (CFI) and is a single-point, pulse time modulated injection system. Fuel is metered into the air intake stream according to engine demands by a single solenoid injection valve, mounted in the throttle body.

Fuel is supplied from the fuel tank by a high pressure, electric fuel pump mounted in the fuel tank. The fuel is filtered and sent to the fuel charging assembly injector fuel cavity and then to the regulator where the fuel delivery pressure is maintained at a nominal value of 39.2 psi (270 kPa).

A single injector nozzle is mounted vertically above the throttle plate and connected in series with the fuel pressure regulator. Excess fuel supplied by the pump, but not needed by the engine, is returned to the fuel tank by a fuel return line.