Causes of carbon deposits
The carbon deposit we often talk about is not really "carbon", but a mixture. Due to the long-term operation of the engine, the gel left by oil, dust, debris, etc. It is mainly produced by the evaporation and oxidation of unburned gasoline.
Carbon deposits are an inevitable problem for all cars, so it is necessary to clean up the carbon deposits, otherwise excessive accumulation will affect the normal driving of the car. The best thing to do is to remove it and clean it thoroughly, but there's usually no need to go to that trouble.
Where are the main production sites of carbon deposits?
1. Engine combustion chamber!
This is also the most important part of carbon deposit cleaning! The main location of carbon deposits is on the piston. The carbon deposits adhere to the piston and have a certain adsorption ability to the gasoline sprayed from the fuel injector. Therefore, the fuel consumption may increase. Moreover, when starting the cold car, the mist is first sprayed. The dissolved gasoline may be partially adsorbed by carbon deposits, so it may be a little difficult to start! How to clean: Use special cleaning equipment, spray it directly on the piston, soak it for a period of time, and then pull out the decomposed carbon deposits and cleaning fluid! Such as pulse equipment, which is also the most effective way to clean carbon deposits.
2. Carbon deposit on throttle valve
This is also very important. Excessive carbon deposits on the throttle will seriously affect idle stability and also have a great impact on fuel consumption!
Fault phenomenon: unstable idling, slow acceleration, high fuel consumption
How to clean: Remove this and clean it with throttle cleaner. Remember that many models need to be rematched!
3. Carbon deposits in the intake manifold
This effect is not very obvious, but for models that can change the intake track, it must be paid attention to! The cleaning method is to remove and clean it, which has the best effect. You can also use fuel additives to clean the carbon deposits in the intake manifold.
4. Carbon deposits in the three-way catalytic converter!
This is more important. If there is too much carbon deposit here, it will cause the three-way catalytic converter to be directly blocked, causing the engine exhaust to be blocked and the power to be seriously reduced! In addition, excessive carbon deposits will damage the rare metals in the three-way catalytic converter, causing the three-way catalytic converter to fail, thereby completely losing the effect of purifying exhaust gas!
How to clean: For this, you usually remove the oxygen sensor, then pour in cleaning fluid, soak it for a period of time, and then take it out! The cleaning method is similar to cleaning the combustion chamber!
5. Clean the carbon deposits in the air intake system
Cleaning the carbon deposits in the intake system mainly refers to cleaning the carbon deposits inside the intake duct, intake manifold, etc. Its purpose is to remove carbon deposits inside the intake system, increase the intake air flow and speed, and reduce engine vibration and idling instability.
Generally, 4S shops or repair shops will use the method of hanging bottles to pump the air intake cleaning fluid into the intake pipe. The cleaning agent participates in combustion cleaning and removes carbon deposits on the valves, combustion chamber, and piston head. It is recommended that naturally aspirated engines be cleaned once every 40,000 kilometers, and supercharged engines are recommended to be cleaned once every 20,000 kilometers.