Car Engine Management System
Your car's engine management system is a complex system that includes various components such as:
Power train Control Module
Electronic Throttle Control
Engine Control Units
Electronic Fuel Injection
EFI Service & Repairs - How does fuel injection work?
Fuel injection replaced carburetion as the principal form of fuel/air delivery to vehicles in the mid 1980s. The simple, efficient design offered a new standard of reliability and efficiency by delivering fuel in varying volume and frequency - a process that would become more sophisticated as electronics replaced mechanical components within the injection systems.
With a petrol engine, fuel is transferred via an electronic pump known as a fuel pump. This fuel subsequently passes though a filter that removes most contaminates that have entered (or corroded from) the fuel tank.
This filtered fuel then enters one end of a common feeding tube for an engine's fuel injectors called a fuel rail. The other end of this rail is met by a pipe that leads back to the fuel tank - called a return pipe. This pipe contains a fuel pressure regulator (essentially a resistor, or blockage) that ensures all fuel within the fuel rail is kept at a constant pressure (essential for precise metering of fuel).
The engine's injectors 'feed' from this pressurised fuel delivery circuit.