What should GAC Toyota do if it enjoys engine idling jitter?

What should GAC Toyota do if it enjoys engine idling jitter?

Engine vibration usually has several reasons. The most common reason is that the engine carbon deposit seriously causes automobile vibration, that is, the throttle valve is too dirty or the nozzle carbon deposit is too much, because the gasoline adsorbed on the carbon deposit after landing is sucked into the cylinder by the engine for combustion, and the combustible mixture of the engine is dilute and thick, which leads to idle vibration after cold start. Solution: The company cleans the oil circuit, and checks whether the idle motor has carbon deposit, so it should be cleaned.