What is the serious problem of carbon deposition in the fourth cylinder of the tenth generation Accord for the first time?

The main reason is that inappropriate oil products are used.

The main reason is that inappropriate oil products are used. It is recommended to add a certain amount of detergent when refueling. If the effect is not obvious, it means that the engine has a lot of carbon deposits. In this case, the car must be driven to a 4S shop, and the carbon deposit in the engine must be removed by professional technicians. Moreover, it is best to drive at high speed after cleaning, which is beneficial to increase the exhaust volume and let the strong airflow bring out larger carbon particles.

Excessive carbon deposition If the carbon deposition in the engine cylinder is serious, it will cause spark plug blockage and valve blockage, which will directly lead to the idling jitter of the car. If the acceleration ability of the car is not as good as before and the jitter is lasting, then you can consider cleaning the engine cylinder.