I have a 99 civic ex auto . Anyways, i've had it for almost a year and today i heard some very wierd noises. After i came home from the uni, i started my car to go grocery shopping and whenever i would take my foot off of the accelerator, it would make really weird noises as if it was grinding on something. Then i put it in park, reved it a few times, and the same problem occured. I have driven it 200 miles over the service mileage. Is it serious or something minor? Oh yeah, the noise seemed to be coming from the center of the engine.