Ive got a 94 JDM H22A on my 5th gen Accord. Im just wondering how I can cure that problem. The weird thing is, after driving for 30mins or so... it doesn't bog down anymore. Its usually the first 30mins or more that it does this.

After revving it past 4000rpm...and releasing the gas....the needle goes down 500rpm or something and you can feel the car shake just a lil.

Timing? Vacumms?

anybody? thanks!