Fuel Injection System - 5.0L/5.7L TBI: Description

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