After the car started, I felt wobbly. When you step on the brake in D gear, the vibration is worse than neutral gear, and the vibration in P gear is worse than neutral gear. Have you cleaned it?

1. Oil path problem: The postal path problem is generally that the oil path is blocked, resulting in poor oil supply, which is characterized by engine jitter, unstable waiting speed and flameout during driving; In addition, the engine will shake when the oil pump fails. Judge the problem of the oil pump, disconnect the oil pipe, and check the related flow and flow.

2. Circuit problem: Check whether the positive fit is accurate. Generally, abnormal ignition is a positive matching problem; Check whether the spark plug is aging, whether the gap is the same and whether the gap changes; In addition, the abnormal operation of the distributor will also cause engine jitter.

3. Mechanical reasons: check whether there is abnormal noise in the engine running state and whether there is abnormal noise in the valve; Check whether the working condition of the belt is loose.

These are just some personal experiences. In case of such problems, it is best to go to a professional repair shop for inspection. An experienced master should check the problem first and then repair it. Some repair shops do not carry out fault inspection and blindly replace parts, which not only can't solve the problem, but also costs a lot of repairs. In addition, the parts of the original car are generally not easy to replace.