Fuel Injection System - TBI: Description

The Throttle Body Injector (TBI) system has 2 major subsystems: electro-mechanical fuel delivery system and electronic air/fuel control system. Fuel delivery system includes electric fuel pump, fuel pump relay and TBI assembly. Air/fuel control system includes Electronic Control Module (ECM), Electronic Spark Timing (EST) system, Idle Air Control (IAC) system, data sensors and emission controls. ECM uses information received from sensors to control air/fuel ratio and emission devices.