The fuel system in a vehicle is responsible for storing, delivering, and combusting the fuel needed for the engine to run. It comprises various components such as the fuel tank, fuel pump, fuel injectors, and fuel lines that work together to ensure the proper flow of fuel to the engine.

Fuel systems can be either carbureted or fuel-injected, with modern vehicles predominantly using fuel injection systems due to their efficiency and performance benefits. Regular maintenance and inspection of the fuel system are crucial to ensure optimal engine performance and fuel efficiency, preventing issues such as poor acceleration, engine misfires, and stalling. It is essential to use high-quality fuel and adhere to recommended service intervals to keep the fuel system in optimal condition.