Fuel Delivery and Air Induction: Description and Operation

The Electronic Fuel Injection system is a multi-point, pulse fuel injection system. This system supplies the engine with air/fuel mixture necessary for efficient combustion. Air induction system and fuel injection systems work in conjunction with an electronic engine control system consisting of various sensors, switches, and a Powertrain Control Module (PCM). Sensors and switches are connected to the PCM, which interprets data it receives and computes when and for how long injectors are energized.

Basic engine requirements are determined from data supplied to the PCM by the Volume Air Flow Sensor, which measures intake air quantity. 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 send signals to the PCM. This permits control over injector opening duration to maintain optimum exhaust emission control and engine performance.

The fuel delivery system supplies filtered, pressurized fuel to each injector. The system consists of an electrical fuel pump mounted in-tank, fuel filter, fuel pressure regulator, fuel injectors, fuel pump switch (located in the Volume Air Flow Sensor), fuel pump relay, fuel tank, inertia switch and connecting lines.