4g69 engine dithers at medium speed.

There are many reasons for engine vibration. If there is nothing wrong with the engine, please check the engine bracket. It may be that the rubber sleeve of the bracket is hardened or cracked. Check the fixing bolts. In addition, the exhaust pipe should be flexibly installed on the chassis. If there is no flexible installation but hard connection, it may also cause engine vibration. If there is no problem, it may be the gearbox. If it is not too serious, it can be ignored, because the car may be worn in all parts when it runs100000 kilometers. The gap between all parts, especially the gearbox, is not to the point where it can't be used, but the overall wear is large and it can't be replaced. Only in this way can there be another way, that is, the failure of the car can never be found in time, and there is a process of development and expansion. This kind of fault does not affect the use, that is, we can pay close attention to it and judge it gradually when it develops again. There may also be oil pressure, dirty throttle and so on.