What is the general problem of engine jitter when Suzuki Swift suddenly accelerates?

The reason of carbon deposition is the cold start, flameout or jitter of the car.

The cold car began to shake these points: 1, and the throttle was dirty. When the cold car starts, the engine has insufficient air intake, resulting in insufficient combustion. After a few seconds, the computer will automatically adjust and it will be fine. 2. The carbon deposit in the intake valve is serious. The oil sprayed by the cold car is sprayed to the intake valve, and most of it is absorbed by the carbon deposit in the valve, resulting in too thin fuel in the cylinder, and then it shakes a few times. These two kinds are very common. The solution is cleaning. For the first problem, clean the throttle valve and air intake in 4S, and for the second problem, use advanced fuel additives to clean the carbon deposit in the air intake valve. This problem can basically be solved.

In fact, the cold car jitter is that a cylinder is in poor working condition, which has nothing to do with the water temperature sensor.

When the engine is running 1 min, touch the size of each spark plug by hand, find out the lowest temperature and the highest temperature, and observe the discharge electrode colors of the two spark plugs. Dark yellow should be the kind that burns a lot, and black (the kind that burns well and is hot) should be the kind that burns badly (the kind that burns badly and is not hot). Adjust the gap of the non-hot discharge port according to the gap of the hot discharge port.

The difference between unstable operation of cold car and good operation of hot car lies in whether the mixture concentration and ignition intensity are appropriate, which leads to instability.