Fuel Injection System - Multi-Point: Description

NOTE: Information for the 2.3L Turbo engine is limited to description and operation. Information was not available from the manufacturer.

The Ford multi-point fuel injection system consists of 4 basic sub-systems: fuel delivery, air induction, engine sensors and the Electronic Control Assembly (ECA) of the EEC-IV computer. The fuel delivery system includes a high pressure fuel pump and the fuel charging manifold assembly (including the fuel injectors and fuel pressure regulator). The 2.3L Turbo engine is equipped with a low pressure, in-tank fuel pump which delivers fuel to chassis-mounted high pressure pump.

Fig 1: 1.6L Engine Multi-Point Injection System

The air induction system consists of the air cleaner, air vane meter assembly, throttle body and intake manifold. Engine sensors supply the ECA with engine operating information. These sensors are the throttle position sensor, engine coolant sensor, vane airflow sensor, vane air temperature sensor and oxygen sensor.

The Electronic Control Assembly (ECA) is the "brain" of the system. Information supplied to the ECA by the engine sensors is interpreted as specific engine operating conditions. The ECA then controls engine functions to produce ideal air/fuel mixture and ignition timing in response to these conditions.

Fig 2: 2.3L Turbo Engine Multi-Point Injection System