For machine filter、empty filter、Air conditioning filter，Everyone may be familiar with，Often ignores auto filter。So，What is auto filter? How long should I change the auto filter? Let's talk about it together。

Auto Filter，Full name gasoline filter，It is a kind of fuel filter，is filtering fuel impurities，Provide clean fuel for the engine，Protecting important car parts of the engine and fuel supply system。

Gasoline is producing、In the process of storage and transportation and use，It will inevitably produce a certain amount of impurities such as iron oxide、Dust, etc.，or the quality of the oil stations in some fuel stations is poor，Contains a lot of impurities，If these impurities are not filtered out，Bring it into the engine and fuel Seabetsupply system，It is possible to damage the cylinder or cause the fuel jet mouth to block。This requires auto filtering to filter impurities，Guarantee the normal operation of the vehicle。

Auto filter element is generally divided into two types，One is a inline fuel filter，The other is a built -in fuel filter。

We are the most common is the inline fuel filter，It is outside the outer fuel tank，Connect with the oil inlet pipe，The main function of the inlet pipe is to transport fuel into the engine。The biggest advantage of the inline fuel filter is that it is easy to replace。

and built -in fuel filter，It is located in the fuel tank，It's difficult to replace，Maintenance costs are also higher。But the pass rate of gasoline is very high，and it is not easy to block，But the disadvantage is that it is very troublesome to change，If you want to change，Not professional personnel operate can easily damage the car。

Auto filter replacement cycle is relatively long，Generally change 3-50,000 kilometers，Specific needs to be based on your maintenance manual or actual usage。At the same time，It is also dependent based on the quality of gasoline used。If the fuel impurities content is large，The chance of blocking the gasoline filter will greatly increase，The replacement cycle should be appropriately shortened。Another thing to note is，If the car appears, the following phenomenon，excluded other reasons，Maybe your gasoline filter is too dirty or blocked，It's time to change it。

1. Speed ​​acceleration seabet ioweak，and the vehicle large load runtime is obvious: gasoline filter element is slightly blocked，Generally, the engine will not supply oil，As a result, the engine power will decrease。

2. The engine shake during idling: the moderate blockage of the gasoline filter element，Not only does it not make the motor power worse，It will also cause engine jitter when the car idle。

3. Start the difficulty or start the car directly: When the gasoline filter is seriously blocked，The phenomenon that the car will have difficulty or even cannot be started。As sometimes it is necessary to fire 2-5 times to hold it。

Of course，The above faults need to be excluded after other faults，can we judge that it is a problem of fuel filter，Failure phenomenon and fuel system failure caused by the problem of fuel filter (such as lumping mouth block) is similar。

Last，Remind riders，Most of the engines are equipped with one -time non -demolished washed paper filter element gasoline filter，When changing the gasoline filter,，Be sure to buy genuine high -quality filters，and operate in accordance with the manufacturer's guidance regulations。

If a poor quality filter element is used，Not only poor material，and poor filtration effect，Soak in gasoline for a long time，The filter element itself will have a filter layer falling off，Covering Oil Road，Causes abnormal pressure of fuel system，Directly lead to insufficient engine power or insufficient combustion，The subsequent results will make you "unexpected"!