MFI Control System

Circuit Description
The Multiport Fuel Injection (MFI) control system is an electronic fuel metering system with fuel injectors near the inlet ports of each cylinder. The amount of fuel injection is determined by the ECM according to engine speed and intake air-flow quantity. The emission control system includes Oxygen sensors and catalystic converters. The MFI's three major functions are to control air-fuel mixture, idle speed and ignition timing.