You go to refuel, and the master puts a hand into your exhaust pipe to feel it. Look at this dark one. It has carbon deposits. You need to add fuel treasure. Go and see which car is not black. This is just a bluff. It doesn't matter whether his gloves are washed or not. I touched it in the car and gave it to us directly. I'm afraid his hand will be burned.

1. Touch the exhaust pipe and say it's dark.

I also found an interesting news on the Internet. A gas station master, he used this routine. "Wow" went in and "gasped". I didn't expect that the exhaust pipe he inserted was a fake exhaust pipe that was later modified, and it was blocked and did not ventilate.

I was embarrassed to death when the owner found out. I didn't add any gas, so I changed to a gas station. In fact, the inside of the exhaust pipe is black and completely normal. The top of that gas stove is also black, so it is impossible for gasoline to burn completely 100%. The company found 10 cars downstairs, and 10 cars were all black. That doesn't mean that the engine has a serious carbon deposit.

2. The fuel tank pressure rises and there is a sound.

The second routine tells you that the fuel tank pressure is too high. Listen, listen, this tank is like coke when it is opened. "Shh" is loud, isn't it? "Shh" is loud, isn't it?

The new car has just been mentioned for less than half a year, and the master ran over and said that the car was old and had carbon deposits. You see, when you open the tank cover, it starts to explode. You need to add 1 bottle of fuel treasure at one time.

If there is pressure in the fuel tank, the exhaust is normal. This is easy to happen, especially when the temperature is high in summer or the model of China 6B is relatively new. Zhang of Jilin University's paper "Research on the Design of Passenger Car Fuel System Meeting the National Sixth Emission Standard" said: In order to protect the environment and save fuel, the design of the whole fuel system is different from the past, and it is necessary to collect gasoline vapor completely.

So occasionally there is pressure to vent, just like opening a coke, don't worry. Start all kinds of unnecessary pipes normally after refueling. Unless you can't start them, check the carbon canister, which has nothing to do with carbon deposition.

It is said that the tail gas is smelly and the combustion is abnormal.

The third routine. "Tut-tut", the tail gas of your car seems particularly smelly and poisonous. Your engine is not burning properly, so you need to add fuel treasure. This kind is also quite outrageous. First of all, the tail gas can't smell good. Scientifically speaking, all kinds of volatile organic compounds in tail gas are irritating and unpleasant. Usually, three-way catalysis will help us filter out most of the harmful gases, so the smell of tail gas is generally not obvious. If it really stinks, it can't be because of carbon deposition. It is very likely that there is something wrong with the three yuan. Check whether it was stolen or broken.

4, high fuel consumption, poor power, you can try fuel treasure

After all, gas station employees don't have perspective eyes, so there is no way to know whether the engine has carbon deposits. The best tester is ourselves. If you go to work normally every day, it used to be around eight o'clock, but now it's 10.

We are the same, why is it that the engine is a bit stupid when you step on the accelerator deeply? This performance seems to be obviously not as good as the new car, which is a bit dull and stupid. In this case, you should consider checking to see if the car really has too much carbon.

5. What does carbon deposit look like?

If your car really has such a situation, you want to solve it but dare not spend more money. Look at the carbon deposit in the engine. Just like colonoscopy and gastroscope, our tube is inserted in this engine.