97 honda accord

Accord EX VTEC 2.2L with 65,000 miles. Have slight engine vibration felt through steering wheel on power curve @ 2000 rpm. At highway speed at 2500 rpm, put in neutral and it goes away. Also with a cold engine, idling @ 1500 rpm, hands on steering wheel, vibrations is felt in and out. Replaced all four engine mounts with no improvement. Also rear engine mount vacuum and switch checks out ok. Any help is appreciated, thanks in advance.