Then, disconnect the throttle's sensor wire.Remove the car's ground terminal to the battery.Always follow the manufacturers instructions. Also, the installation for an ITB may differ. Keep in mind that the replacement process may vary by manufacturer and the car's make and model. ITBs reduce the need for constant pumping on the gas pedal.An individual throttle body offers more efficient air flow.Air rushes straight to the engine on an individual throttle body.Since the ITB gives each cylinder its own valve, air enters the engine quickly and produces an instant throttle response. Unlike single systems that share one valve, an ITB, or Individual Throttle Body, sits on each cylinder bank. How does an individual throttle body work? Both electronically-controlled and mechanical throttle body systems run air into each cylinder bank for power.Throttle position sensors control the electronic throttle body by signaling the rate of fuel to the injectors to give the engine power.A spring-loaded throttle mechanism connects to the accelerator to operate mechanical throttle body systems.The parts may have either a mechanical or electronic control. When you press the gas pedal for power, the throttle body opens to control the air flow from the intake manifold to the engine. It is one of the most critical components of the engines air intake system. The butterfly valve positioned between the intake manifold and air filter is called the throttle body. Before selecting a replacement part for your car or truck, you should know how a throttle body differs from individual throttle body systems. It determines how fast and how much fuel can reach the engine. A throttle body is essential to your vehicles fuel injection system.