Why does a car smell of gasoline when it is turned off

First of all, pay attention to check whether the pipes in the canister system are broken.

Gasoline vapor is discharged directly into the atmosphere along the damaged area, causing the smell of gasoline in the car. If the pipeline leaks at this time, it is air instead of fuel vapor that enters the engine inlet will inevitably cause the engine mixture to be too thin, resulting in the phenomenon that it is not easy to start.

It is also possible that there is a problem with the solenoid valve of the canister. If the solenoid valve is always closed, the gasoline vapor in the canister will accumulate more and more, and eventually fill the entire canister, and the rest of the gasoline vapor can only escape into the atmosphere, polluting the environment and wasting fuel.

This can also happen if the injector leaks. It is recommended to go to a 4S shop or repair shop for on-site inspection according to the above conditions.

After parking, you can smell the smell of gasoline outside the car. There are several possibilities:1

The smell of gasoline after the flameout. Because the gasoline is not completely burned at the moment of stalling, the exhaust gas will smell of gasoline. This is normal.

2.The gas is too full. 3.

There is a problem with the vehicle itself. If this is the factor, there are many reasons involved, such as leaking fuel tanks or lines, problems with the gasoline pump, and so on. If the vehicle is more than three years old, the carbon canister needs to be checked.

and solenoid valves. Also, check the tank and the oil pipes in and out of the tank, which are likely to be clogged. The oil pipe in and out of the fuel tank is under the car, and sometimes the oil pipe can be scratched by bad road surface.

If it's just a pinhole-shaped hole, you can only smell gasoline and you can't see the oil leak. Because you can't see the real car, you can't make an accurate judgment. It is recommended to go to a 4S shop or a professional auto repair shop in time, and let the technician check it first to determine what the problem is, and then rectify it.

1. Too much carbon accumulation in the throttle and air flowmeter.

Throttle and air flow meter are still relatively easy to get dirty, most of the current cars are electronic throttle, a little carbon deposit may affect it, too much carbon deposit on the throttle will cause the fuel pedal to be stuck, the power is seriously reduced, and the idle speed is unstable!

The air flow meter is dirty, resulting in the wrong air flow signal, and the air intake determines the amount of fuel injection, which directly leads to inaccurate fuel injection, not only the fuel consumption will increase, but the power is seriously insufficient.

2. There is a gasoline leak in the car.

You need to go to the repair shop or dealer to check as soon as possible, this situation is likely to be a problem with the oil circuit of the gasoline pump, but it is also possible that there is a problem at the interface, many models of gasoline pumps are under the rear seats, as long as you open the rear seats, open the cover of the gasoline pump can be easily observed.

If it is really a problem with the gasoline pump, then the gasoline smell will go directly into the cockpit, and the smell will be very strong.

3. There is too much carbon deposit in the cylinder combustion chamber and piston.

There is too much carbon in the combustion chamber of the cylinder, which will have a certain adsorption effect on gasoline. In addition, there is too much carbon deposit, most of which will be formed on the valve and piston ring, which indirectly causes insufficient cylinder pressure.

There may be many reasons for the unstable idling speed of the car, such as vacuum leakage, spark plug breakage, etc., but the above problems occur after running one or two thousand kilometers, it is definitely not a broken part, it may be that the maintenance is not thorough.

4. The rubber pipeline of the carbon canister is aging.

The rubber pipes in the engine compartment will deteriorate after long-term use, and once they are aged, gasoline may leak out, which is generally the case in older models. The solution is also very simple, only need to replace the aging rubber tube.

5. There is residue when disassembling and assembling the gasoline pump.

Disassembling and assembling the gasoline pump needs to be completed in the car, and it is inevitable that there will be some residues in this process, if it is not cleaned up, it is possible to smell gasoline in the process of using the car. The solution is to go back to the repair shop to check that the petrol pump is installed correctly and that the surrounding area needs further cleaning.

Hello, after the car is parked, the moment it turns off, it will smell of gasoline because the gasoline is not completely burned.

Especially in winter, this situation will occur more frequently, you need to observe whether the car has a fault cause, if there is a continuous gasoline smell, then you need to check whether the car throttle valve is insufficient and the situation occurs.

If the smell of gasoline is only temporary for a short time, then you can rest assured that it is a normal phenomenon. Of course, it is also possible that the gasoline smell is too full in the tank, so you need to speculate on the situation.

If the temperature of the engine is not up to normal working condition, it may cause the fuel to not burn sufficiently, which will also cause the smell of gasoline. If the combustion is not sufficient at the moment of extinguishing, the smell of gasoline will appear in the exhaust gas, which is a very normal phenomenon, and you can rest assured.

Kiss! , gasoline does not burn out after the flameout taste. Because the gasoline burns fully at the moment of flameout, there will be a gasoline smell in the exhaust.

This is normal. 2. The gasoline is too full. 3. There is a problem with the vehicle itself.

If this is the case, the causes are compared, such as a leak in the fuel tank or line, a problem with the gasoline pump, and so on. If the vehicle is more than a year, it is necessary to focus on checking the carbon canister and the solenoid valve. In addition, the fuel tank needs to be checked in and out of the tank tubing, which may be clogged.

In and out of the fuel tank the oil pipe is at the bottom of the car, and walking can sometimes scratch the oil pipe. If it's just a pinhole, you can only smell gasoline, but you can see an oil leak.

Insufficient gasoline combustion, oil leakage in the fuel tank, and problems with gasoline carbon canisters are all reasons for the smell of gasoline when the vehicle is started. 1.Gasoline burns inadequately.

Because the ECU will adjust the fuel injection volume according to the intake air temperature when the car is cold, the fuel injection volume will be relatively large when the car is cold, but when the engine is just started, the oil-gas mixture in the cylinder is not completely burned, and the oil and gas that are not fully mixed are directly discharged from the exhaust pipe. The amount of gasoline in these gas mixtures is relatively large, so there will be a gasoline smell. 2.

A leak in the tank or an oil leak can make us smell gasoline, but it's very unlikely. Cars that don't have a big crash generally don't have this problem. The inspection method is also very simple.

Just look where you park and see if there's any dripping oil on the ground. Regardless of whether the fuel tank is leaking or not, there will be traces on the ground. 3.

The problem with gasoline canisters. The main material of the canister is our activated carbon. It is known to have a very strong adsorption capacity.

And the role of the carbon canister in the car is to absorb the oil vapor in the engine oil, because gasoline will be seriously vaporized at high temperatures, which will put a lot of pressure on our fuel tank. It is either expelled or collected. When the canister is damaged, the oil and gas in the canister will leak out.

So, in this case, it's always in the car.

The reasons for the smell of gasoline when the car is ignited: 1. The cold car starts at a low temperature, and the oil and gas are not fully combusted, and it is directly discharged from the exhaust pipe, so it will smell some strong gasoline smell; 2. After starting the car, when the engine reaches the normal working temperature, the oil and gas in the cylinder are fully combusted, and the gasoline smell will gradually disappear. 3. The fuel injector has a leakage phenomenon, which will cause the unburned mixture to be discharged from the exhaust pipe, and the gasoline smell will be particularly strong; 4. If there is a smell of gasoline in driving, it may be that the engine has a lack of cylinder, and the gasoline that is not burned is discharged through the exhaust pipe, and the smell enters the compartment when the car slows down.

If there is a gasoline smell when starting, it is normal, because when the car starts cold, the ECU will appropriately increase the fuel injection according to the inlet air temperature and water temperature signal, at this time, the engine has not reached the normal working temperature, the oil and gas can not be fully combusted, and a very small part of the oil and gas that has not been fully burned is discharged, and the smell of gasoline will be smelled.

When the engine reaches the normal working temperature of 80-90 degrees, the oil in the cylinder is fully combusted, and the gasoline smell disappears. This is normal.

Leakage at the gasoline pipe interface:

If the gasoline pipe interface leaks and the gasoline smell enters the car through the air conditioning system, the engine compartment cover should be opened to check whether there is leakage, and if there is leakage, tighten the interface in time or go to the repair shop for maintenance.

Rubber tube aging:

The rubber hose in the engine compartment will deteriorate over time, and older vehicles are prone to aging, and gasoline may leak into the engine compartment. The air conditioning system then allows the smell of gasoline to enter the car.

Gasoline burns inadequately, and fuel is discharged without being completely combusted.