The car bumps badly. How to solve it?

There are several reasons why the car runs very bumpy: 1. If the steering wheel wobbles while driving, the tire may be deformed. 2. Engine jitter may be caused by poor ignition of spark plug. 3. Some cylinders are not working properly. 4. The connection between the suspension system and the engine is loose. 5. Dynamic balance may be needed. 6. It may be necessary to remove carbon deposits from the engine.