Roewe 550 slow down. What's going on here?

What happened to Roewe 550 slow air? The engine produced carbon deposits.

1, this situation is mainly because gasoline is not fully absorbed by the engine, resulting in the formation of carbon deposits, resulting in insufficient combustion of the car, leading to car jitter and increased fuel consumption.

2. If the throttle valve or fuel nozzle is not cleaned for a long time, the spark plug is not replaced for a long time, or even the intake manifold fails, it will affect the fuel atomization combustion and lead to a series of problems. If the oil filter, air filter and air conditioner filter are not replaced for a long time, it is easy to cause the filter to be blocked by impurities, and in serious cases, it will send an error message to the engine control unit, resulting in damage to the engine and other components.