Fuel Injection System - EFI: Operation: General

The Electronic Fuel Injection system is unique in that it actually measures the volume of both fuel and air entering the engine. The airflow meter measures the volume of air entering the air cleaner, and the computer signals the control motor to add enough fuel to achieve the desired 14.7:1 air/fuel ratio. Finally, the oxygen sensor and other engine sensors help the computer to fine-tune the mixture to accommodate various driving conditions that require a richer or leaner mixture.