Why does the smell of exhaust suddenly appear in the interior of a used car
- May 5, 2023
- 0
Clean air in the car is the key to the health of the driver and passengers. However, the idyll is often disturbed by the fact that exhaust gases
Clean air in the car is the key to the health of the driver and passengers. However, the idyll is often disturbed by the fact that exhaust gases begin to enter the “living room”. The AvtoVzglyad portal tells where to look for the cause of a very smelly problem.
Such a nuisance can occur even in a low-mileage car. At the same time, the stench first settles in the trunk and only then penetrates into the cabin. And if you do not have a sedan, but a hatchback, then the smell will be immediately noticeable. At the same time, the muffler does not cut, the trunk floor is free from corrosion, and a nozzle is installed on the exhaust pipe that removes gases backwards.
It’s a matter of aerodynamics. Turbulence occurs in the air stream at the rear of any vehicle. And both at the bottom and at the top. That is, somewhere there is an “aperture” through which the suction passes. For example, it could be a torn rubber seal or worn gill flaps under the bumper.
One of the functions of such devices is to ensure normal ventilation of the cabin, since the air after passing through the filter must not only freely enter, but also go out. He leaves the “gills”, the design of which is designed to release air, but they do not let it back. If the plastic of the “gills” is deformed and the rubber is dry, then gases, as well as dirt and dust, begin to penetrate.
Another reason: Gasoline is getting into the exhaust system because the sensor that determines the amount of air entering the cylinders is junk. This causes the electronic control unit to dose the fuel supply inaccurately. Incidentally, “our brands” such as LADA Granta often suffer from this. To eliminate it, it is enough to clean the sensor from dirt.
Finally, if the car has been used a lot and oil has been burned, the unburned lubricant residue, mixed with fuel, ends up in the exhaust system. The catalytic converter quickly clogs up and the cabin begins to smell the same as old motorcycles. Some owners, trying to avoid this, remove the catalytic converter in artisanal conditions and put a “trick” on the lambda sensor.
Only the exhaust doesn’t stop anymore. Gases still enter the hidden cavities of the body and penetrate into the driver’s lungs. Tip one – change the converter to a new one. Yes, it is expensive, but health will be in order.
Photo: Drive2.ru (Maximus3722)
Such a nuisance can occur even in a low-mileage car. At the same time, the stench first settles in the trunk and only then penetrates into the cabin. And if you do not have a sedan, but a hatchback, then the smell will be immediately noticeable. At the same time, the muffler does not cut, the trunk floor is free from corrosion, and a nozzle is installed on the exhaust pipe that removes gases backwards.
It’s a matter of aerodynamics. Turbulence occurs in the air stream at the rear of any vehicle. And both at the bottom and at the top. That is, somewhere there is an “aperture” through which the suction passes. For example, it could be a torn rubber seal or worn gill flaps under the bumper.
One of the functions of such devices is to ensure normal ventilation of the cabin, since the air after passing through the filter must not only freely enter, but also go out. He leaves the “gills”, the design of which is designed to release air, but they do not let it back. If the plastic of the “gills” is deformed and the rubber is dry, then gases, as well as dirt and dust, begin to penetrate.
Another reason: Gasoline is getting into the exhaust system because the sensor that determines the amount of air entering the cylinders is junk. This causes the electronic control unit to dose the fuel supply inaccurately. Incidentally, “our brands” such as LADA Granta often suffer from this. To eliminate it, it is enough to clean the sensor from dirt.
Finally, if the car has been used a lot and oil has been burned, the unburned lubricant residue, mixed with fuel, ends up in the exhaust system. The catalytic converter quickly clogs up and the cabin begins to smell the same as old motorcycles. Some owners, trying to avoid this, remove the catalytic converter in artisanal conditions and put a “trick” on the lambda sensor.
Only the exhaust doesn’t stop anymore. Gases still enter the hidden cavities of the body and penetrate into the driver’s lungs. Tip one – change the converter to a new one. Yes, it is expensive, but health will be in order.
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.
