Fuel Control Operation

An electrically pulsed injector is located in the intake manifold throttle body unit. The 2.5L engine uses one throttle body-mounted injector, while all other engines use two throttle body-mounted injectors. The ECM controls injector "on" time (pulse width) to provide the proper amount of fuel to the engine, resulting in a 14.7:1 air/fuel ratio under most conditions.

Fig 1: Model 700 Throttle Body Injection Unit Used on 2.5L Engine

Fig 2: Model 220 Throttle Body Injection Unit Used on V6 & V8 Eng