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5 Components of the Fuel System in Cars and Their Functions

09 April 2025
5 Komponen Sistem Bahan Bakar Pada Mobil serta Fungsinya

Along with the development of technology, vehicle components continue to be updated to improve their performance. Both cars that implement EFI systems and carburetors have components of the fuel system. This component serves as both a supplier and a regulator of the amount of fuel that enters before it is processed. Here are some components that also play a role in it. 

Components of the Vehicle Fuel System and Their Functions

Here are 5 components of the car fuel system that you must know:

1. Fuel Filter 

Vehicles that use carburetors generally add a fuel filter that has a lifespan, so it needs to be replaced periodically to maintain its performance.

Generally, you can find this car component in the middle between the carburetor and the fuel tank. 

This car component plays an important role in filtering dirt that comes along with gasoline from the fuel tank before it reaches the carburetor.

In addition to functioning as a dirt filter, this component also plays a role in filtering and separating water that comes along with the gasoline.   

2. Fuel Pump 

The next component of the fuel system is the fuel pump, which plays an important role as the pump for gasoline stored in the fuel tank to be channeled to the carburetor.

The gasoline that is successfully sucked will be sent back towards the carburetor after passing through the fuel filter first.

Carburetor vehicles generally come with two different types of fuel pumps depending on the year of manufacture.

Older vehicle models are generally equipped with a mechanical fuel pump, while newer carburetor vehicles have used an electric fuel pump, also known as a rotary pump. 

You should know that carburetor cars do not actually require gasoline at a certain pressure like vehicles that use EFI systems.

This is because this type of vehicle only needs gasoline to pump it into the tank. The gasoline that has been stored will be used in the combustion process to generate the main energy of the vehicle. 

3. Fuel Tank 

Another important vehicle component in the combustion process is the fuel tank. This fuel system component serves as a reservoir for gasoline that will be channeled to the engine, as well as a storage place for gasoline that is no longer suitable for use. 

4. Carburetor

The carburetor functions to convert gasoline, which is initially in liquid form, into vapor or mist, to be channeled to the combustion chamber.

Based on this brief explanation, it can be confirmed that the carburetor plays an important role for a vehicle. 

Compared to other component systems, it can be said that its operation is quite complex.

This is because this component is responsible for regulating the supply of gasoline in the right proportions under every vehicle condition. If there is damage to the carburetor, the vehicle cannot operate. 

Read Also: Here Are the Car Components That Require Periodic Service

5. Fuel Delivery Line 

Playing an important role in delivering gasoline from the fuel tank to the carburetor, in other words, this fuel system component holds an important role.

Generally, this component is made from rust-resistant iron pipes, then combined with rubber hoses in some parts.  

So far, many still think that the carburetor is the main component that plays an important role in the combustion process.

However, behind the hard work of the carburetor, there are several other components that also contribute to ensure that combustion occurs perfectly and the vehicle can run well. 

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