What is the purpose of a conventional fuel rail in a MPI (Multi Port Injection) fuel system? A. To serve as a fuel reservoir for all of the fuel injectors B. To distribute fuel to all of the pistons C. To lower the pressure of the fuel system D. To cool the temperature of the fuel.

The correct answer is A. To serve as a fuel reservoir for all of the fuel injectors.<br /><br />In a Multi Port Injection (MPI) fuel system, the conventional fuel rail serves as a fuel reservoir for all of the fuel injectors. The fuel rail is a metal or plastic tube that holds the fuel injectors and provides a common connection point for the fuel supply line and the return line. The fuel rail helps to regulate the fuel pressure and flow to the injectors, ensuring a consistent and efficient fuel delivery to the engine cylinders.