Purpose

The function of the fuel and air control system is to manage fuel and air delivery to each cylinder to optimize the performance and driveability of the engine under all driving conditions. Fuel is distributed through the fuel rail to eight injectors inside the intake manifold. Each port fuel injector is located directly above each cylinder's two intake valves. Fuel pressure is controlled by a pressure regulator mounted on the fuel rail. The throttle body regulates air flow from the air cleaner into the intake manifold, which then distributes this air to each cylinder's two intake valves. This allows the driver to control the air flow into the engine, which then controls the power output of the engine.