回复：请教发动机震动的原因

区别发动机非正常抖动的方法：
1。misfiring: 有脉搏状感觉，随转速升高而减弱。
2。rough idle: idle changing itself all the time.
3. engine mount: apply parking break. start enging and holding break padle firmly then shift from park to reverse back and forth. if you hear and noise and feel the engine move back and forth that is the mount