What should I do if the exhaust emission is unqualified, and what should I do if the motor vehicle e

There are scalpers in each inspection line, just find scalpers to give some money.

You can buy an accelerant such as fuel treasure at a gas station, add it before refueling, and then refuel to pull the high speed, generally run thirty or forty kilometers, and then go to check the car. My 07 Bora was inspected like this last year, and this method was told to me by the person who inspected the line, you can try it.

Drive directly to the 4S shop and take a good car for maintenance. They will give you some professional advice.

Clean or replace the three-way catalytic converter: The function of three-way catalysis on the vehicle is to oxidize CH and CO to CO2 and H2O, and reduce NOx to N2, so it is the key to pass the exhaust gas detection. Three-way catalysis is prone to carbon blockage or poisoning and failure, which is reversible and can be reactivated by cleaning, while poisoning failure and damage need to be replaced.

Cleaning or replacing spark plugs:Ignition system failures such as spark plugs and high-pressure packs will also cause vehicle emissions to exceed the standard, and poor spark plug working conditions will cause emission pollution to increase. The spark plug is also prone to carbon accumulation, and can also be reactivated by sandpaper cleaning or cleaning with cleaning agent, and the ignition gap can also be adjusted.

However, if the spark plug is found to have a faulty ablation or has reached the end of its useful life, it will be replaced.

Precautions for motor vehicle exhaust emission testing.

Before entering the factory for testing, we must keep the vehicle in a starting state, even if you wait in line, don't turn off the engine because of saving a little fuel, the reason is very simple, the best working temperature of the three-way catalytic converter is 400 to 800 degrees, the vehicle has a long process from cooling to 400 degrees, and it is very unwise to test the test line on the cold car.

Change the oil regularly. Engine oil mainly plays the role of lubrication, cleaning, cooling, and anti-rust and corrosion in the engine. Therefore, every 3,000 to 5,000 kilometers driven or every three months, you can consider changing the oil.

Hello solutions to unqualified automobile exhaust detection: 1. Clean the three-way catalytic converter, which is the key to exhaust purification, which is prone to carbon blockage or poisoning and failure, and carbon blockage can be cleaned to restore activity, and poisoning failure and damage need to be replaced; 2. Before cleaning, the oxygen sensor has a great effect on exhaust emissions, and the carbon deposits discharged from insufficient combustion of the engine will adhere to its surface, which will cause the oxygen sensor to fail for a long time; 3. Replace high-quality gasoline, which helps to fully burn and can help improve exhaust emissions; 4. Check the working condition of the engine, its poor working condition will affect the exhaust emissions, and the annual exhaust gas inspection is unqualified, you can clean the internal carbon deposit and oil circuit of the engine.

1. [Change 97 gasoline] (I feel that this is not very important, because the quality of oil in China is not good, it is an option, and it costs more than a dozen yuan):

The original low-grade gasoline was used up, 97' gasoline was used, and after running dozens or hundreds of kilometers, it was tested again.

Principle: High grade oil pollution is small. It is also better to have ethanol gasoline, which is mixed with 10% ethanol, and the exhaust emissions will be reduced by 10%.

2. [Hang 4th gear, run 5th gear with big throttle, run dozens of kilometers].

Highly recommended! It doesn't cost but is practical): hang 4th gear, run 5th gear with a big throttle, and run dozens of kilometers. (If you are not very confident in the condition of the vehicle, it is best to carry out a maintenance of the vehicle before pulling the highway.) )

Principle: Urban roads are congested, start and stop, combustion is insufficient, and pollutants are attached to the surface of the three-way catalytic converter.

Gasoline combustion at high rpm emits the lowest amount of pollutants, and the high-speed air flow can also wash away the dirt attached to the ternary.

What to do if the car exhaust gas test is unqualified.

3. [When there is a serious failure, only consider replacing the three-way catalytic converter].

In extreme cases, the exhaust gas is unqualified, and the treatment point and maintenance point will generally directly kill you, and you have to directly replace the three-way catalytic converter and spend thousands of yuan. Only when necessary (if the ternary has aged and failed), should the middle section of the smoke pipe (three-way catalytic converter) be replaced.

There are not a lot of exceedances, and there is generally no need to replace the three yuan, and the maximum cleaning is three yuan, which is generally fine. Replace the middle section of the smoke pipe (three-way catalytic converter).

The front section is the intake pipe and also has some catalytic converters, and in general, only the most important middle section can be replaced, and you don't need to listen to the recommendations of the maintenance point at all, asking you to 'replace the front section of the smoke pipe at the same time'.

4. [Keep the car hot, idle without turning off the engine.] Slam the throttle in the gap before the inspection for 3-5 minutes] :(This is the most important! This is mandatory, and the others are optional. )

As long as this is done, the general vehicle condition can pass the test. If you can't do this, even if the new car is sometimes difficult to pass. Not long ago, it was verified during the annual inspection of an old car of a friend.

Keep the car hot, even if you wait in line, idle, and don't turn off the engine to save a little fuel.

Start the vehicle when there are two or three cars in front of you before the test, and bang the throttle at high rpm for a few minutes. (Generally 3-5 minutes is fine, don't be stingy with that bit of oil at this time), and then test the exhaust emissions at this time.

After the car has been used for a long time, the exhaust valve and spark plug carbon deposit form a large amount of carbon deposit, and a large amount of black smoke will be emitted when starting.

Motor vehicle exhaust emissions are shown to be unqualified. Be sure to take it to a repair shop for repairs.

1. The abnormal noise of low-speed driving is not obvious, and the high-speed driving emits a uniform humming sound Fault cause: This phenomenon occurs when a wheel bearing of the vehicle is damaged. Long-distance driving has high requirements for the bearings of the wheels, and the bearings with poor quality or have been used for a long time will be damaged due to fatigue and make abnormal noises under long-term high-speed operation.

2. Low-speed driving emitted a rhythmic humming sound, and the abnormal noise of high-speed driving weakened Fault causes: the four-wheel alignment of the vehicle is inaccurate, and the long-distance driving has greater wear and tear on the tires, and the tires form partial wear and make abnormal noises.

3. The idle speed is high after high-speed driving, or slightly unstable.

Cause of failure: The engine runs at high speed for a long time, and part of the carbon deposits inside the engine will be burned off due to high temperature, and it will be discharged with the exhaust. That's why it's often said that it's easy to drive a car at high speeds.

However, in the control system of some engines, the engine control unit cannot immediately adapt to the reduction of carbon deposits in individual cylinders, and the fuel injection and ignition are carried out according to the previous adaptation values, which will cause the idle speed to change or be unstable. After a few hours of engine operation, the control unit gradually learns the new adaptation values and idling speed resumes.

The first one is to replace and clean the spark plugsBecause the spark plug is an important part responsible for the ignition of the car. The old driver said that if you do not pay attention to cleaning or replacement for a long time, the accumulation and aging of carbon deposits on the spark plug will lead to incomplete combustion of gasoline and substandard emissions due to the reduction of spark plug ignition efficiency. Therefore, the owner of the car regularly inspects and replaces the spark plugs.

The second is the replacement of the oxygen sensorMany car owners do not know what the role of the oxygen sensor is, in fact, the main function of this part is to detect the oxygen concentration of the engine exhaust gas, by detecting the oxygen content in the exhaust gas and judging whether the gasoline is fully combusted. If the oxygen sensor is broken, it will not be able to detect whether the exhaust gas meets the standard, which will cause the annual inspection to fail.

The third is a three-way catalytic converterBasically, car owners should know that its biggest role is to filter and purify the exhaust gas, if it is not cleaned up for a long time, resulting in the accumulation of impurities in it, it may make the three-way catalytic converter lose its effect and cause the exhaust emissions to not meet the standard.

There are several ways to deal with unqualified exhaust gas detection:

Replace the spark plug. (Both old and new, as long as the electrode points are cleaned with sandpaper, the gap can be adjusted, and my own is the old spark plug replaced).

Clean the distributor contacts and distributor contacts.

Adjust the ignition time. (Delay ignition time, this will significantly reduce the amount of NO (nitric oxide) in the exhaust gas, which is crucial, so be sure to remember!) Due to the delay in ignition, the combustion time in the combustion chamber will be shortened, the maximum combustion temperature will be reduced, and the hydrocarbons and nitrogen oxides emitted will be reduced.

However, this will result in a decrease in engine power. It is also commonly known as the big fire head and the small fire head is to make the fire smaller, and when is it good? Adjust the fire head to the limit, as long as you can run on the high-speed around the city, it can reach 100km hours, because the adjustment is too late, the car can not run, and you can adjust it back after testing.

Clean the air filter. (If it is too dirty, it is recommended to replace).

Clean the throttle with a cleaning agent.

Clean the three-way catalytic converter and oxygen sensor. (After the three-way catalytic converter was removed, I rinsed it with tap water, and at first it was coffee-colored water, and then it was fine, and the two ends were changed.) There should be other better and more thorough cleaning methods, such as banana water, dilute hydrochloric acid is also available, please also be able to provide friendly services, so that the majority of riders can benefit).

Change to 97 petrol or 97 ethanol petrol.

Pull section high speed. (The engine is at high speed, which can clean the engine carbon deposit and the smoothness of the three-way catalytic converter in the exhaust pipe, so that the three-way catalytic converter can work more effectively).

Before filling out the form at the testing station and waiting for the test, you must keep the car idling and warming. (The three-way catalytic converter is effective at high temperature in hot cars, characteristics: its working temperature is about 250-800 °C), I ran dozens of kilometers without delay and went directly to the testing station for testing.

Add some water to the exhaust cylinder with a high-pressure weigher at the car wash near the testing station.

Use a car exhaust purifier! (Add the car exhaust purifier to the fuel tank, idle for 20 minutes or drive 5-10 kilometers, and you can reach the standard!) ）

Before testing, keep the engine speed at 4000 rpm and run for 1-2 minutes. in detection.

Remove the battery cable and connect it again after a few minutes, the general vehicle will be fault-free, and the fault code will be extinguished. If it is not extinguished, it is necessary to go to a professional maintenance place to detect the damage and repair it in time.

If the CH is unqualified, it is necessary to change the fuel, clean the engine and oil circuit, clean or change the three-way catalysis, CO and NOX are unqualified, and check or exchange the oxygen sensor (used to detect the concentration of oxygen in the exhaust gas, and send a feedback signal to the ECU, and then the ECU controls the increase or decrease of the injector fuel injection, so as to control the air-fuel ratio of the mixture near the theoretical value), three-way catalysis (it can discharge CO carbon monoxide, Harmful gases such as HC hydrocarbons and NOx nitrogen oxides are converted into harmless carbon dioxide, water and nitrogen through oxidation and reduction. ）。

The three-way catalytic converter does not have the catalytic ability at room temperature, and the catalyst must be heated to a certain temperature to have the ability to oxidize or reduce, usually the ignition temperature of the catalytic converter is 250-350, and the normal working temperature is generally 350-700.

Hello 1Replace high-grade gasoline With high-grade gasoline, it is possible to pursue higher engine power and smaller displacement, and improve power and fuel economy. High-grade gasoline is cleaner, and the content of CO, NO, and HC pollutants produced after combustion will be greatly reduced.

Cleaning or replacing the three-way catalytic converter The three-way catalytic converter is the most important external purification device in the automobile exhaust system, and ignoring the maintenance of the three-ring catalytic converter for a long time will lead to the blockage of the three-ring catalytic converter, the ability to convert harmful gases will decrease, and finally the exhaust emissions will not meet the standard.

Replace the spark plug and clean the fuel injector The ignition energy of the spark plug is insufficient, and the oil and gas can not be completely burned, resulting in the HC content in the exhaust gas exceeding the standard, and the fuel injector has a poor atomization degree, and the mixed oil and gas is too concentrated may also lead to the pollutants in the exhaust gas being too high to pass the test.

"If the CH is unqualified, it is necessary to change the fuel, clean the engine and oil circuit, clean or change the three-way catalysis, and if the CO and NOx are unqualified, it is necessary to check or change the oxygen sensor (to detect the concentration of oxygen in the exhaust gas, and send a feedback signal to the ECU, and then the ECU controls the increase or decrease of the injector fuel injection, so as to control the air-fuel ratio of the mixture near the theoretical value).

Solutions to unqualified automobile exhaust gas detection:

1. Clean the three-way catalytic converter, which is the key to exhaust gas purification, which is prone to carbon blockage or poisoning and failure, and carbon blockage can be cleaned to restore activity, and poisoning failure and damage need to be replaced;

2. Before cleaning, the oxygen sensor has a great effect on exhaust emissions, and the carbon deposits discharged from insufficient combustion of the engine will adhere to its surface, which will cause the oxygen sensor to fail for a long time;

3. Replace high-quality gasoline, which helps to fully burn and can help improve exhaust emissions;

4. Check the working condition of the engine, its poor working condition will affect the exhaust emissions, and the annual exhaust gas inspection is unqualified, you can clean the internal carbon deposit and oil circuit of the engine. Hope.

Vehicles that exceed the standard will be fined. For example, if a motor vehicle emits pollutants that exceed the prescribed standards and refuses to make corrections within the prescribed time limit, a fine of 200 yuan will be imposed, and three points will be recorded. If the vehicle exhaust gas is found to be unqualified, the traffic police department will temporarily detain the vehicle driving license on the spot, and the owner must repair and rectify it within 7 days.

With the re-inspection certificate, the vehicle driving license can be changed back, and the penalty for exhaust gas is not up to standard is 200 yuan. The treatment measures for non-standard exhaust gas are as follows:1

Improve the quality of existing vehicle power units and fuels. Maximize the use of diesel engines. From the point of view of pollution, diesel and gasoline vehicles are basically polluting, but no measures have been taken.

Gasoline vehicles are more polluting; 2.Exhaust gas purification measures on the outside of the engine. Now, some advanced exterior purification technologies are widely used to purify the exhaust gases produced by automobiles to reduce pollution.

This method can achieve better results. External purification technology is to install various purification devices in the exhaust system of the car to reduce pollutants in the exhaust gas by physical and chemical methods; 3.Restricting vehicle emissions through laws and regulations; 4.

Strengthening the management of automobiles in use can reduce and eliminate the pollution of automobile exhaust to the atmospheric environment.