I have had the vibration curse, Ever since I put my cam in I have had one vibration after another. My current vibration is very noticable at 2000 and 4000. When just idling and holding it at 2000 it vibrates the whole car. The entire car will shake. And when driving it vibrates and the motor feels very rough and doesnt accelerate smooth. It does this until about 4500 and then clears up until i shift. The whole car will shake and rattle. I have new plugs and I am sure none of the wires are burnt. Maybe a bad plug, or a bad opti, or maybe an O2. Please tell me some ideas to look for that I am not thinking of!

 

sounds like your not running on all 8 cylinders, double check your plugs/wires then move on to the rockers, you might have one too tight or loose, is your car hard to start?

 

Ive checked my rockers a couple times but i can double check, the car seems to start up better than ever. Thats why i was thinking maybe opti or even motor mounts or something!