Fit cleaned the throttle nozzle. Why is the car still shaking?

Engine running jitter exists objectively in every car, but there is a clear difference between obvious and serious.

First of all, if the engine idle speed is too high, it will be unstable, and one of the problems is that it will shake, so the manufacturer will set a suitable idle speed to make the shake not obvious.

Secondly, the dynamic balance of engine suspension components (crankshaft, flywheel, etc.). ) can't be completely zero, and there will be individual differences. If the accuracy is too high, the cost may rise rapidly.

In addition, when the water temperature is low at the beginning, the low-temperature combustion of the mixture is insufficient and the jitter is obvious.

In addition, the jitter of some new cars will be obvious during the running-in period, and it will be reduced after a period of time. And after using it for a long time, it is no longer interesting when you get used to it.

Therefore, in general, the jitter phenomenon of high-end cars will be lighter than that of low-end cars, and the jitter degree of vehicles of the same model will not be exactly the same.