Fuel Delivery and Air Induction: Description and Operation

The Electronic Fuel Injection (EFI) system is a multi-point, speed density, pulse time fuel injection system. A Mass Air Flow Sensor is incorporated to provide additional information to the ECA. Fuel is metered into each intake port in a sequential firing order, once every crankshaft revolution.

An Electronic Engine Control computer (EEC-IV) receives signals from various engine sensors and computes the required rate of fuel flow to maintain an optimum air/fuel ratio throughout the entire range of engine operation. The computer then sends a command to the fuel injectors to meter the appropriate quantity of fuel.

The EEC-IV engine control system determines and compensates for changes in altitude (i.e. from sea level to mountains). The system will also automatically compensate for the age of the vehicle and its uniqueness. For manual transmission vehicles it will also permit for push-starting if it becomes necessary.

The fuel delivery system consists of a high pressure electrical fuel pump mounted in-tank, high pressure fuel filter, fuel supply manifold, pressure regulator, fuel injectors, inertia switch, fuel tank and connecting lines.