The Duke of Teana 3.5vip 1500 felt the engine shaking a little.

It may be that the engine has serious carbon deposition, the engine is short of cylinders, and the combustible mixture of the engine is sometimes thin and sometimes thick, which leads to idling jitter after cold start.

The reasons for engine jitter of Nissan Teana are as follows: the engine has serious carbon deposition, and the most common reason for vehicle jitter is that the throttle valve is too dirty or the fuel nozzle has too much carbon deposition. When there is too much carbon deposit in the engine, the gasoline sprayed by the cold start injector will be absorbed by the carbon deposit. Engine cylinder missing: Engine cylinder missing mainly refers to that one or more cylinders of the engine are not working normally, indicating that the exhaust gas flowing out of the car is obviously intermittent, and the exhaust pipe is shaking violently, and the engine can be obviously felt shaking, sometimes accompanied by abnormal noise. This is mostly related to ignition coil failure. The engine combustible mixture is thin and thick, which causes idling jitter after cold start. The lower the temperature, the more oil is needed for cold start and the more carbon is deposited, which will affect the success of cold start.