vibration problem need an expert my rsx is falling apart need HELP!!!

ok so it vibrates the whole car ONLY at about 1000 to 2000rpm then is fine up to 8000 it can be in N or any gear clutch engaged or not any speed NO codes tho


engine mounts "seem" ok no clunking or any abnormal engine movement .
car has 100,000 mi 2003 rsx type s

pleas help the vibration is unbearable

does any one know if the k20a2 has a counter balance shaft and can it go bad


thanks in advance for any help

Could a balancer belt brake (if it has one)?

Sam