After searching a couple pages I couldnt find anything similar to my vibration issue. When the car is could everything is fine. After it warms up it takes the idle about 20-30 seconds to come back down from the 1500 range and I have a weird vibration issue. It vibrates very mild for about 2 seconds and smoothes out for about 2 seconds, it will do this until the idle goes back down to were it should be and then itr stops. The engine has about 2000 miles on it and started about 500 miles ago. I would assume if it was something internal in the engine it would be vibrating all of the time but im not sure. I thought the exhaust might be resting on on something under the car but couldnt see anything. Any ideas?