What is the function of car fuel filter?
Car fuel filter is an important part of the vehicle's fuel system.
The effect of car fuel filter
The fuel filter has the function of removing dirt, residue or impurities in the gasoline before the gasoline passes through the fuel pump, fuel injector to enter the engine combustion chamber.
Removing all impurities makes the fuel combustion process easier and more efficient, while also helping to prolong the life of internal engine components.

The car's fuel filter is a part of the vehicle's operating system, which has the function of filtering out dirt and impurities in gasoline that exist in the air before entering the combustion chamber. Because those impurities are the cause of damage, causing the engine system to become clogged and run unstable. Over time, it can reduce the life of the parts and require replacement, which is very expensive.
In addition, filtering clean gasoline also helps save fuel effectively, burn all fuel, avoid the phenomenon of gasoline not being burned completely and escaping through the exhaust pipe as black smoke.
As a part that filters dirt and impurities, after a period of use, the car's fuel filter will become dusty and gradually corroded. Leaving it for a long time will reduce its performance, causing the filtering process to slow down.
Worse still, the blockage prevents the engine from receiving enough fuel to ensure vehicle operation, which leads to phenomena such as stalling, difficulty starting, or jerking when moving.
Therefore, drivers need to regularly clean and change oil filters on schedule.
When to change car fuel filter?
According to experts, the most suitable time to change the oil filter is after 2 years of operation or after traveling 40,000 km.
However, in reality, with the current road and air conditions on most roads in Vietnam, car owners may have to consider replacing the fuel filter sooner. Therefore, car owners can rely on the following phenomena of the car:
Difficult to start and weak, vibrates when moving
The fuel filter is clogged with dirt and impurities, resulting in the inability to supply the correct amount of fuel to the combustion chamber. This condition causes the gas and fuel to burn early, burn late, burn incompletely, and even cause the engine to stall...
The consequences can be listed as: The engine is weaker when moving, vibrates and grinds when the car is left idling. If left for a longer time, the car will also experience conditions such as: Difficulty starting or not starting, stalling while moving, shaking when accelerating,...
Exhaust has black smoke or sparks
When a spark appears in the exhaust pipe, it may be due to a clogged fuel filter, leading to an external explosion. A clogged fuel filter causes fuel and dirt to not be completely burned, leading to them escaping through the exhaust pipe as black smoke.
The car consumes more fuel than usual.
When your car consumes more fuel than usual, you may immediately think that the cause is a clogged fuel filter. This causes the fuel to burn early or burn late, causing the fuel to not burn completely. At this point, the car owner needs to replace or clean the car's fuel filter.