The annual exhaust of the car can t pass, and the number in this circle is a little higher?

When carrying out the annual inspection of the car, if the exhaust gas detection is always not passed, we need to check the three-way catalytic converter of the car, because the three-way catalytic converter can also transform some harmful gases from the exhaust gas of the car into harmless through oxidation and reduction, which is mentioned so it can also play an environmental role, and it is also relatively expensive for the three-way catalytic converter, and there are a lot of heavy metals in it. Therefore, if your car is not particularly old, the car does not need to replace the three-way catalytic converter, you only need to clean it, and you can't operate it when you clean it, it is recommended that you go to the repair shop to clean it up.

And we also need to pay attention to the maintenance of the three-way catalytic converter in ordinary times, under normal circumstances, the car needs to clean and maintain the three-way catalytic converter after every 30,000 kilometers. If the car has traveled more than 150,000 kilometers or about 200,000 kilometers, the three-way catalytic converter can be replaced. However, now our country's oil products are actually unable to keep up with the requirements of the national emission standards, and now many places have also implemented the national 6 emission standards, so the country's fuel quality is also constantly improving.

However, if the driving environment is not particularly good, it will also cause the air filter of the car to be blocked, which will also cause a large amount of carbon deposition, and it will also lead to unqualified emission standards of the car during the annual inspection.

Therefore, we also need to pay more attention to the maintenance of the car in ordinary times, and if the working condition of the engine is not good, the mixed combustion will not be too complete, so it will also cause the emission standards to not meet the standard, especially for those cars with a long age, so we also need to pay more attention to these, and when conducting the annual inspection, we should also pay attention not to carry out the online inspection in the case of a cold car, it is best to warm the car in advance. This can also help you to better meet the standards when conducting exhaust gas testing.

In short, the annual inspection of automobile exhaust is still very important and unavoidable, we must prepare for the annual inspection, so that we can better pass the annual inspection.

If you can't pass the exhaust gas, go to the store and spend dozens of yuan to clean it, and just run on the high speed.

<> "In addition to the six-year exemption of new cars, cars must be inspected every year, and the saddest thing about inspecting cars may be exhaust gas and liquid emissions, because some friends may not maintain well, or often add inferior gasoline, resulting in exhaust gas that does not meet the standard. Now let's talk about what to do if the exhaust gas does not meet the standards.

The first direct cause of non-conformity is a problem with the three-way catalytic converter. First of all, it is recommended to clean the three-way catalytic converter. There are many ways to clean a three-way catalytic converter.

One recommended cleaning method is to pay attention to the cleaning method of the oxygen sensor, and after the oxygen sensor on the vehicle is removed, use a special cleaner to clean the exhaust pipe when the vehicle catches fire.

It may be that your front oxygen sensor is damaged, causing the mixture to become thicker and affecting exhaust emissions. It is recommended to remove it and see if its color is black. It is recommended to replace it after blackening.

Gasoline is not good. It is recommended to pre-fill a tank of high-grade high-quality fuel a few days before the annual review.

Due to poor engine accessories, the exhaust gases are not up to standard. It is recommended to remove carbon deposits that have accumulated in the throttle and cylinder.

Before inspecting the car, it is also essential to check the various lights, wipers, and handbrakes. Therefore, it is necessary to perform good maintenance so that the car inspection goes smoothly. Otherwise, you'll run back and forth between the inspection line and the repair shop, wasting time and money.

If the exhaust gas is unqualified, go do it and clean the engine.

Throttle valves, spark plugs, inlet branches, ternary carifiers, PVC valves (more than 4 years old have to be replaced).

Then go clean or replace the three-way catalytic converter, it should be able to solve the problem.

What should I do if the annual inspection of the car is unqualified? Learn these 4 points, no need to look for scalpers.

If the engine mixture combustion is not sufficient, there will be a large amount of carbon deposits, which will be emitted with the exhaust pipe and will adhere to the three-way catalytic converter and the surface of the oxygen sensor. Therefore, cleaning the three-way catalytic converter and oxygen sensor will solve the problem of unqualified vehicle exhaust gas in many vehicles. If there is a problem with the added oil, the sulfur, lead and phosphorus contained in the oil will cause ternary poisoning, resulting in the failure of the three-way catalytic converter poisoning, which needs to be replaced, and the simple cause of carbon deposition can be cleaned with oxalic acid solution to restore activity.

2. Clean or replace the spark plugs.

Spark plugs, high-pressure packs and other ignition system failures will also cause car emissions to exceed the standard, spark plugs are wearing parts, the most prone to problems, poor working conditions of spark plugs will cause emission pollution to aggravate. 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 has an ablation failure or reaches the end of its service life, it needs to be replaced with a new one, and if it is replaced with a new one or with better performance, the engine condition will be much better, and the exhaust emissions will be improved.

3. Deep cleaning of the engine.

What should I do if the three-way catalyst and oxygen sensor are cleaned and the spark plug is replaced, and the vehicle exhaust emissions still do not meet the standard? If this happens, on the premise that there is no fault in the air flow meter, temperature sensor and other sensors, then it is necessary to do a major maintenance of the engine to clean the carbon deposit. Clean the throttle, oil circuit, air intake, fuel injector, etc., clean the carbon deposit inside the engine, and the working condition of the engine will be improved a lot, so as to avoid the problem of aggravated emission pollution caused by the poor working conditions such as incomplete combustion of the mixture.

I went to inspect the car this time, and encountered a troublesome thing, the exhaust gas was unqualified, no wonder, this car is 15 years old, three-way catalysis or combustion is not good, this is understandable. It just so happened that when he was about to re-test at the door, the staff of the company added detergent to the same exhaust gas vehicle added an object, a slender bottle. I was curious, so I went over and asked, it turned out that most of the exhaust gas is caused by bad combustion, I'm a Citroen car, just try a bottle, anyway, I haven't been, and then I have to pay for the test, so it's better to try this.

It's magical, the next thing is that the exhaust gas is directly passed once. Is this gadget so magical? I'm going to be skeptical, anyway, I'm too bad this time.

Although I didn't buy a few more bottles, if you have exhaust gas that is not qualified, it is better to find the palace"The company has a general car life"to help everyone find here.

Try it, I should have washed the three-way catalysis last year. It's not going to be blocked again just every other year.

1. Go to the repair shop to repair it thoroughly, replace the replaced parts, and spend a lot of money to ensure that the exhaust gas is qualified;

2 is to find a service agent in the testing field, 200 yuan OK, fast and neat to save a lot of trouble. Both methods cost money, and you have to weigh it yourself. At present, some provinces and cities have carried out environmental protection exhaust inspections on the road, and if the car without environmental protection standards and the exhaust gas exceeds the standard are caught if they are unlucky, the fine is inevitable.

The role of EFI in automobiles is reflected in four aspects: exhaust emissions, fuel consumption, cost and driving comfort. At present, EFI technology has been able to solve the pollution of nitrogen oxides and hydrocarbons in automobiles.

It is estimated that your control system needs to be adjusted, and the time of EFI can be slightly advanced, and it is best to use the EFI at the moment when the piston rises almost to the downward inflection point, the more fully the combustion and blasting, the less exhaust gas (including nitrogen oxides, of course). (Because your car's exhaust is colorless, it won't be caused by a piston ring leak.) ）

When you finish inspecting the car, they should give you a rectification notice within a time limit, which has the address or ** of the repair, and then go to the inspection line for inspection once after the repair.

Otherwise, you can go to the inspection line and ask, they know that they are repairing in **.

If you can repair (press) the three-way catalysis of the vehicle yourself, it will not be a big problem.

What to do if the exhaust gas is not up to standardIf the exhaust emissions are not up to standard, it may be caused by damage to some sensors on the vehicle or damage to the three-way catalytic converter. The three-way catalytic converter is located behind the exhaust manifold. This device reduces pollutants in the exhaust gas.

If the three-way catalytic converter is damaged, the pollutants in the vehicle exhaust will exceed the standard, resulting in substandard exhaust emissions. There are a lot of sensors in the car, and the normal operation of the car is inseparable from these sensors. Oxygen sensors are important for exhaust emissions.

A typical car has two oxygen sensors, one behind the exhaust manifold and the other behind a three-way catalytic converter. The oxygen sensor can detect the oxygen content in the exhaust gas, and then the oxygen sensor feeds the signal back to the ECU, which can adjust the air-fuel ratio according to this feedback signal. In this way, the air-fuel ratio can always be close to the ideal air-fuel ratio.

If the oxygen sensor is damaged, inaccurate data will be fed back to the ECU, or even the data will not be fed back to the ECU, so the ECU will not be able to accurately adjust the air-to-fuel ratio, so the exhaust emissions may not meet the standard. If there is too much carbon in the engine, it can also lead to substandard exhaust emissions. Usually, do not add low-quality gasoline to the Shengxun car, which will increase the carbon deposit of the engine.

If you're constantly driving on congested city roads, carbon deposits in the engine will also increase. Many engines now use direct injection technology, so direct injection engines are particularly susceptible to carbon deposits. Direct injection engines are prone to carbon build-up on the top of the piston and on the back of the valve.

It is recommended that owners who use in-cylinder direct injection engines clean up carbon deposits every 2-30,000 kilometers. Many auto repair shops clean up carbon deposits by hanging bottles. This method does not remove carbon deposits at all, so it is not recommended for riders.

The best way to clean up carbon deposits is the walnut sand cleaning method. When using the car on a regular basis, it is also possible to remove a small amount of carbon deposits by increasing the rotational speed. If you want to reduce the formation of carbon deposits, you can add additives to remove carbon deposits.

When choosing additives, choose products from big brands, such as 3M, HKS, Chevron, etc. Millions of car purchase subsidies.