What is the reason why Honda Civic's automatic accelerator will jump when stepping on 2000 to 3000 rpm?

It is possible that the gap between the throttle opening in the speed range of 2000~3000 is just stuck by the altar, resulting in unstable speed.

It may also be caused by intermittent fire of spark plug or ignition system within this speed range.

Please go to the 4S shop for professional maintenance.