What is the reason for the start jitter of the tenth generation Civic Pride?

The tenth generation Civic Pride car was started with one button. At the moment of starting, what is the reason for the body shaking? Is it normal? Vehicle jitter may be caused by dirty throttle or dirty oil! It is recommended to go to a 4S shop or a regular garage to check!

Your engine may have carbon deposits and the fuel injectors may be dirty. Please clean it.