Cold start gasoline smells what s going on

The temperature of the three-way catalytic converter is relatively low after the cold start, and the catalytic efficiency of the three-way catalytic converter will be very low if the temperature of the three-way catalytic converter is too low. There is a part of gasoline that cannot be burned during negative ignition, and this gasoline will be discharged along the exhaust pipe, so there will be a smell of gasoline after the cold start. It is normal for the smell of gasoline to be relatively strong after the cold car starts, and there is no need to worry about it.

The three-way catalytic converter is an important component in the exhaust pipe, and the three-way catalytic converter is installed on the exhaust pipe head section, which is used to purify the exhaust gas. If there is no three-way catalytic converter, the pollutants and harmful substances in the automobile exhaust will exceed the standard, which will affect human health and pollute the environment. The three-way catalytic converter will fail after a long period of use, and if the three-way catalytic converter fails, the fault light on the dashboard will be on.

The three-way catalytic converter has an oxygen sensor in the front and a back, and the oxygen sensor can detect the oxygen content in the exhaust gas. The data detected by the front and rear oxygen sensors will be fed back to the ECU, and the ECU will compare the data from the two oxygen sensors, if the two data are the same, it means that the three-way catalytic converter has failed, and the fault light on the instrument panel will light up. The three-way catalytic converter should be replaced immediately after failure, otherwise the engine will not be able to operate normally.

This situation is the smell of the carbon canister, as long as the engine temperature is normal and the smell disappears. If there is still a smell of gasoline when the car is hot, it means that the carbon canister is aging and needs to be replaced. Hope it helps, I wish you a pleasant stay.

The reason why the car starts cold and starts with gasoline:

1. Under the condition that the outside temperature is very low, when the water temperature and the exhaust pipe temperature are low, and the outside temperature is too low when the engine is cold started during winter driving, the mixer at this time is relatively thick, so some mixers can not be fully combusted, and are directly discharged from the exhaust pipe, so some strong gasoline smell will be smelled. This should be normal.

2. It is also possible that there is a problem with the carbon canister or the solenoid valve of the carbon canister, resulting in the mixture being too thick when starting.

3. If the local temperature is low and there is too much carbon deposit inside the engine, the mixed gas atomization is not good, which will also lead to the occurrence of this phenomenon.

4. If the solenoid valve has been closed, the gasoline vapor in the carbon canister will accumulate more and more, and eventually fill the entire carbon canister, and the rest of the gasoline vapor can only escape into the atmosphere, and the gasoline smell will also appear.

5. There is a leakage phenomenon in the fuel injector, which leads to the mixture being too thick, and the unburned mixture will be discharged from the exhaust pipe, thus causing the gasoline smell to be large.

In the suction stroke the piston descends, the intake valve opens and air is drawn into the cylinder. At the same time, the fuel injector at the end of the intake manifold of the multi-point EFI engine is injected at the same time, and the atomized gasoline is wrapped in the intake air flow and quickly rushes into the cylinder.

Hello, the cold start has the smell of gasoline, you must first determine whether there is an oil leak, said that it is normal, the cool car has the smell of gasoline, that is, the combustion is not good, check the spark plug, whether the injector is leaking, clean the injector, throttle, I hope to help you. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

1: The engine needs a certain degree of smoothness to start the engine in a cold car, and it is not easy to ignite if it is cold. At present, the exhaust gas is not monitored throughout the whole process, and sometimes in order to ensure the start of the engine, it is possible that some of the gasoline that has not been burned is discharged from the exhaust pipe, so there is a gasoline smell, which is relatively normal for now.

2: Sometimes after the car is turned off, some of the gasoline is not fully burned, because the car is closed, and because the gasoline is a volatile gas, it is permeated with a fast car, so there is gasoline.

Some cars have a normal gasoline smell, but it can't be too heavy, depending on the model. Carburetor cars are normal because they don't burn enough when they start. If it is an EFI truck, it can be preliminarily judged from the following situations.

Damage to the activated carbon canister will cause the following faults: If you encounter a fault when you step on the accelerator to accelerate, and the gasoline smell in the car is relatively large, you should pay special attention to whether the pipes in the carbon canister system are damaged.

If the engine is started and the speed of the car is weak when idling, it is necessary to pay attention to whether it is caused by the blockage of the air inlet and filter of the carbon canister. If the engine stalls or doesn't start easily, check the canister solenoid valve that could cause the problem.

Because if the solenoid valve has been in the open state of rotation, the mixture of the inlet channel of the engine has been in a thickened state, and at the same time, the control unit of the engine has not controlled the solenoid valve of the carbon canister at this time, and will not issue the command to reduce the amount of fuel injection, so that it will cause the engine to turn off when the mixture is too thick when the car is hot, and the phenomenon that it is not easy to start after the hot car is turned off. Also check if there is too much carbon deposit inside the engine.

Cold start gasoline smells what's going onCold start gasoline smells what's going onThere are several reasons why the smell of gasoline is high when starting a cold car:

1. In a low temperature environment, when the cold car starts, the water temperature and exhaust pipe temperature are low, and the engine combustion is not sufficient, resulting in unburned gas discharge from the exhaust gas. 2. There is a problem of carbon deposition or oil leakage in the fuel injector, and the atomization of gasoline is not obvious, resulting in insufficient combustion of gasoline, resulting in gasoline smell. 3. The carbon canister or its solenoid valve is faulty, resulting in the smell of gasoline when the vehicle is started cold.

4. The carbon deposition inside the throttle or air flow meter is more serious, the power decreases, and the fuel consumption increases, which makes the cold car smell of gasoline when it starts. 5. There is a lot of carbon accumulation inside the engine cylinder, which has a certain adsorption effect on gasoline and makes the combustion insufficient, resulting in the appearance of gasoline smell. This may be caused by a long period of hot driving, or it may be caused by a damaged fuel injector.

Some riders have the habit of heating the car, and if the gasoline is not fully burned in the combustion chamber for a long time, there may be a relatively large gasoline smell in the exhaust. After the fuel injector is decorated or damaged, the gasoline can not be fully atomized and enters the combustion chamber, which will also lead to insufficient combustion of gasoline, so there will be a relatively large gasoline smell in the exhaust. The habit of heating a car in place is not right, the right thing to do is to hit @2019

If there is a smell of gasoline after the cold car is on fire in the morning, and it will be gone after a while, then it is normal. When cooling the car, a thicker mixture is required, more gasoline and less air, gasoline combustion is not very complete, and gasoline without combustion is also discharged out of the car and enters the cab from the door or air conditioning intake.

The main reasons for the smell of gasoline in cold start are as follows:1In the low temperature environment, the water temperature and exhaust pipe temperature are low when the cold car starts, resulting in insufficient combustion of the engine and affecting the exhaust gas emissions. 2.

There is a problem of carbon deposition and oil leakage at the fuel injection port, and the atomization of gasoline is not obvious, which affects the insufficient combustion of gasoline; 3.Serious carbon deposition inside the throttle valve and air flow meter; 4.There's a lot of carbon piling up inside the engine.

There are also the following reasons why it is difficult to start the air conditioner:1Fuel pressure regulator failure problem, fuel system oil pressure directly affects the concentration of the mixture.

When the vehicle is difficult to start, the first task is to detect the fuel pressure, and determine the location of the fault problem through the detection of the fuel pressure regulator; 2.The antifreeze temperature is too low, and the engine computer version increases the amount of fuel injected according to the signal sent by the temperature sensor, resulting in the so-called concentrated start; 3.The carbon deposition inside the engine is too much, and the gasoline sprayed by the fuel injection head of the cold start will absorb a large amount of carbon deposits, and the mixture that affects the cold start becomes too thin, and it is difficult to start, and the carbon deposits are absorbed by the sucking and staring cover.

There are several reasons why the smell of gasoline is strong when the car starts cold:1. Low Temperature:

When the outside temperature is very low, when the water temperature and the exhaust pipe temperature are low, and the outside temperature is too low when the engine starts coldly in winter, the mixer at this time is relatively thick, and some mixers do not burn sufficiently and are discharged directly from the exhaust pipe, so they will smell some strong gasoline smell. 2.Canister failure:

It may be due to a problem with the canister or canister solenoid valve, which causes the mixture to be too concentrated at start-up. 3.Too much carbon deposit:

This phenomenon can also occur if the local temperature is low and there is too much carbon buildup inside the engine, resulting in poor atomization of the mixture.