Many friends tend to confuse the concept of fuel pump filter and fuel filter. The fuel pump is installed inside the fuel tank, while the fuel filter is generally installed on the chassis of the car outside the fuel tank, connected to the fuel pipe, which is easier to find.
The fuel filter is one of the “three filters” of the car (the other two are the air filter and the oil filter). The replacement cycle of the fuel filter is longer, so it is easy to be ignored. The fuel filter is used to filter impurities and a small amount of water in the fuel, so the oil product has a great relationship with the service life of the fuel filter, but even if the oil product is no problem, after a long time, the fuel filter will also It will gradually block, and the symptoms of blockage are basically typical oil circuit blockage failures. The clogging of the fuel filter is also a process from light to heavy. The symptoms of minor clogging are not obvious, but you can still feel the decline of the engine operating condition. Serious clogging will cause the car to be unable to use normally.
Because the symptoms of fuel filter blockage and fuel injection nozzle clogging, fuel pump blockage and other oil circuit blockage are similar, if other oil circuit failure problems are excluded, you should consider whether the fuel filter should be replaced when the following 4 symptoms appear .
First, the early blockage accelerates the car
The impurities in the fuel are filtered through the filter paper layer by layer to supply fuel to the engine. If it is slightly blocked, it will cause the occasional mixed gas concentration to be too thin, and there will be a slight sense of frustration when accelerating. Early stage of filter clogging.
2. Slightly blocked the car begins to accelerate poorly, and the engine power decreases
This situation is more obvious when the fuel filter is slightly blocked, especially when the car is under heavy load, the power drop is very obvious, because when the filter is slightly blocked, there will be insufficient fuel supply. The wrong air-fuel ratio directly slows down the power of the car.
3. Serious blockage will cause unstable idle speed and jitter of the car
This is when the blockage is more serious, and there will be continuous insufficient combustion of the mixture, and the engine will be unstable at idling and more serious shaking.
4. Seriously blocked or unable to start the car or difficult to start
The occurrence of this phenomenon shows that the blockage of the fuel filter is very serious. At this time, the car is not only accompanied by serious acceleration problems, but also difficult to start, and it is not easy to drive the car.
The blockage of the fuel filter will cause the oil circuit to be blocked, the mixture ratio will be out of balance, and the mixture will not be fully burned, which will directly cause the engine to generate a large amount of carbon deposits. In order to ensure the good performance of the engine, the fuel filter generally needs to be replaced regularly and preventively. Generally, depending on the refueling product, the car needs to be replaced after driving 30,000 to 50,000 kilometers. If the refueling product is poor, the replacement cycle needs to be advanced. In fact, compared with the fuel filter, when the fuel oil is poor, the blockage of the fuel pump filter will be the first to bear the brunt.
Post time: Mar-02-2022