Fuel Delivery and Air Induction: Description and Operation

Component Location:

The Electronic Fuel Injection System is classified as a multi-point, pulse fuel injection system. The system supplies the air/fuel mixture necessary for combustion. Air induction and fuel injection systems work in conjunction with an electronic engine control system that consists of various sensors, switches, and a Powertrain Control Module (PCM).

Engine fuel requirement is determined from data supplied to the PCM. The Volume Air Flow Sensor measures quantity of air being drawn into the engine. Other sensors and switches measure air temperature, atmospheric pressure, coolant temperature, engine speed and exhaust oxygen content. Sensors and switches detect changes in operating conditions and inform the PCM. This permits proper control of fuel injector ON time (duration injectors are open). The system maintains optimum exhaust emission control and engine performance for across the range of operating conditions.