have a problem with engine vibration while excelerating at rpm 2000 to 2500 then again at 3000 to 3200, have replaced all motor mounts purchaced on ebay, i had a new timing belt installed and a balancer belt, was wondering if the balacer shafts one or both could be a little out of time?? can anybody tell me how the car acts with this condition??? thanks
Frank Allen 92 accord LX

 

How close together was timing belt replaced and the problem starting? If the balancer shafts were out of time they would have started vibrating right after the belt was replaced.

Is there any stumbling acceleration within the mentioned RPMs? Might want to look into cleaning the EGR ports and valve.

 

Were there vacuum chamber mounts that were replaced with solid ones? If vacuum type, the ebay ones might not be loosening up.