3.5L Gasoline Turbocharged Direct Injection (GTDI): Notes
NOTE:
Early build engine cylinder heads and fuel injectors differ in design than late build engines. Although these parts are serviced in the same way, the parts are not interchangeable between early build engines and late build engines. The level of cylinder heads and fuel injectors can be determined by inspecting the engine code label. Early build engines are built through 09/14/2010 (0S 490 BA) and late build engines are built on or after 09/15/2010 (1S 490 BA).
The fuel charging and controls system consists of the:
- Throttle Body (TB).
- fuel injectors.
- fuel rails.
- fuel injection pump.
- FP control module.
- turbochargers.
The fuel charging and controls system is:
- a Gasoline Turbocharged Direct Injection (GTDI) system.
- Pulse Width Modulated (PWM).
Fuel is metered directly into the combustion chamber. Fuel injectors pulse to follow engine firing order, in accordance with engine demand.
The various sensors detect any changes in the operating conditions and send signals to the PCM. This permits the PCM to control the opening duration (pulse width) of the fuel injectors and maintain optimum exhaust emission control and engine performance for all operating conditions.