What are the major components of an electronic injection system?

An electronic injection system is primarily designed to deliver fuel to an engine with optimal precision to improve efficiency and performance. The correct choice includes the essential components that facilitate this process: the pump, common rail, electronic injectors, and the Engine Control Module (ECM).

The pump is responsible for supplying the precise amount of fuel from the tank to the rail, while the common rail holds the fuel at a specific pressure before it is injected into the combustion chamber. The electronic injectors then spray the fuel into the engine at calculated intervals and amounts, ensuring an efficient combustion process. The ECM is a critical unit that monitors and controls the entire system, adjusting fuel delivery based on real-time engine conditions for optimal performance and emissions control.

In contrast, other options either refer to components typical of older fuel systems, like carburetors, or do not encompass the sophistication required for an electronic injection system. Components like a throttle body and air intake are parts of the overall engine system but do not specifically define the core constituents of an electronic fuel injection system.