What is fuel filter and what is its application?

The fuel entering the car’s tank, may contain impurities, micro-microscopic materials, and additional materials such as water, external materials, and contaminations. Sometimes, these materials are so small, can not be seen with eye.

Since the operation of the fuel system components is very sensitive, thus the entry of any impurities and big and small pollutions cause damage and rapid erosion in these parts. Moreover, the entry of water to these areas causes rust and erosion of delicate parts of the fuel system and causes the engine to run irregularly, emission of the smoke out of the exhaust, and reduces engine power.

In order to avoid these problems in the fuel system, fuel filters are used. The fuel is transferred from the tank to the filter after pumping to remove contaminants and impurities from the fuel, and provide fuel to the engine for combustion. The exited fuel from the filter is ready for combustion and is guided to the engine.


How does a fuel filter work?

The fuel is refined in two steps: at first, pump leach, and then filter leach remove impurities from the fuel.

Fuel filters that perform purification, are generally of paper type. The separating section of these filters is made of a special paper. They are folded into a metal chamber for more efficient and effective filtration. Although there are other types of filters, such as felt or cloth filters, today manufacturing and using them has been reduced. The diameter of the paper pores used in the fuel filter varies depending on their application.

There are some factors can cause a gradual blockage of the fuel filter, including: large amounts of rust and rubbish may be accumulated in the fuel tank; there are natural transpiration and humidity in the tank that cause rust; at each refueling time, wastes can enter the tank; the longer the fuel filter is replaced, the more waste it collects in and gradually prevents the gasoline flow to the engine.


What are the effects of dirty fuel filters?

If the fuel filter, or so-called gasoline filter, is dirty, lowers engine efficiency, dirty injectors, rumbles the car when lit, reduces the life of the petrol pump, and crashes the oxygen sensor and even burns the engine’s valve.

Also, if your car is illuminated at start-up, especially during a cold start, it may be due to a dirty gasoline filter.

If the fuel filter or the gasoline filter of your car is dirty, when starting the car, the engine does not turn on immediately after the switch is opened and you should wait a few seconds to get the gasoline pressure in the fuel rail to the right level. Even you may have to start several times.

Dirty gasoline filter reduces engine efficiency. With a dirty fuel filter, the efficiency and power of our engine will reduce significantly, and therefore the stretching of the engine decreases. In this case, the engine speed rises slower, and this issue is sensed when driving uphill or using a cooler, and in the warm seasons, the car’s water meter goes up.


Fuel filter replacing times

Dirty gasoline filter causes the clogging injectors. For this reason, the motor efficiency is greatly reduced and fuel consumption rises. In fact, dirty fuel filter causes the mass and fine particles to pass through the filter and enter the injector. Consequently, the fuel injection path in the injector is closed and that injector fails.

A change in the sound of the gas pump heard immediately after the opening of the switch can also be a sign of its dirtiness. Although drivers often get used to the sound of the fuel pump, its clogging causes an abnormal sound heard.

With these symptoms, it is time to replace the filter. The timely replacement of this part is very important and effective.

To avoid the mentioned damages, you should replace your filter at the right time.