A typical situation: the fuel consumption of a car rises sharply, although there are no external signs of breakdown. The engine runs normally. The driver changes consumables, diagnoses the power unit, but the problem does not go away. The AvtoVzglyad portal tells where to look for the cause.
All vehicles of Euro-2 class and above have a device directly related to the environment. More precisely, with a system for capturing fuel vapors that leave the gas tank and enter the atmosphere. The most important element is the filter adsorber. It is a small plastic “vessel” in which there is an absorbent activated carbon.
When the engine is turned off, gasoline vapors enter the adsorber, where they settle on coal pellets in the form of droplets. So it gets wet. And when the engine is started, a special controller opens the solenoid valve. Thanks to him, a vacuum is created inside the device and air begins to flow inside. It passes through the activated carbon and carries vapors to the inlet channel. After such a purification, the fuel evaporates and the coal dries up. Then the process is repeated again.
The design is quite simple, but it has a flap. Over time, it begins to open poorly or sour completely. This leads to the adsorber failing and the car starting to “eat” fuel. Most often, the masters in the service replace the sensors and make expensive diagnoses. It’s more beneficial. The adsorber is devoid of attention. But it’s easy to check the status of a node. It is enough to unscrew the gas tank cap. If you hear a loud hissing sound, there is no air purification. That is, the system is faulty.
Another cause of problems is the vacuum line on the fuel pressure regulator. When the rubber tube bursts and dries out, air is sucked in. He (air) and the culprit of the fact that the car needs 10-12 liters of “fuel” per “hundred”. A penny consumable can be easily replaced even by an inexperienced motorist. And you don’t have to go to the dealer.
Finally, the problem may be with one of the spark plugs or ignition coils. They also affect fuel requirements. And if the engine is powerful and even the working volume is large, then the problem is not immediately visible. The result is a “fuel burner”. Therefore, regularly check the functioning of spare parts. A simple inspection saves time and money.
All vehicles of Euro-2 class and above have a device directly related to the environment. More precisely, with a system for capturing fuel vapors that leave the gas tank and enter the atmosphere. The most important element is the filter adsorber. It is a small plastic “vessel” in which there is an absorbent activated carbon.
When the engine is turned off, gasoline vapors enter the adsorber, where they settle on coal pellets in the form of droplets. So it gets wet. And when the engine is started, a special controller opens the solenoid valve. Thanks to him, a vacuum is created inside the device and air begins to flow inside. It passes through the activated carbon and carries vapors to the inlet channel. After such a purification, the fuel evaporates and the coal dries up. Then the process is repeated again.
The design is quite simple, but it has a flap. Over time, it begins to open poorly or sour completely. This leads to the adsorber failing and the car starting to “eat” fuel. Usually, the masters in the service replace the sensors and perform expensive diagnostics. It’s more beneficial. The adsorber is devoid of attention. But it’s easy to check the status of a node. It is enough to unscrew the gas tank cap. If you hear a loud hissing sound, there is no air purification. That is, the system is faulty.
Another cause of problems is the vacuum line on the fuel pressure regulator. When the rubber tube bursts and dries out, air is sucked in. He (air) and the culprit of the fact that the car needs 10-12 liters of “fuel” per “hundred”. A penny consumable can be easily replaced even by an inexperienced motorist. And you don’t have to go to the dealer.
Finally, the problem may be with one of the spark plugs or ignition coils. They also affect fuel requirements. And if the engine is powerful and even the working volume is large, then the problem is not immediately visible. The result is a “fuel burner”. Therefore, regularly check the functioning of spare parts. A simple inspection saves time and money.
Source: Avto Vzglyad
Donald Salinas is an experienced automobile journalist and writer for Div Bracket. He brings his readers the latest news and developments from the world of automobiles, offering a unique and knowledgeable perspective on the latest trends and innovations in the automotive industry.