When I first start the car, and the car is in park, everything is fine. No vibrations and Idles just perfectly. Whenever I hold the brakes and put the car in reverse my car starts to shake and continues to shake. I notice the RPM's will drop 2-300 for about two seconds, then go back to normal. Once im driving its perfect, no vibrations or anything. When I stop at stop lights the car rattles slightly, and I also notice once I turn the A/C or Heat on, it will Shake also. Im guessing bad mounts? But I could use some help on this. And at the stop lights also, I will put it in Neutral to stop the shaking.

 

Okay thanks! Ill got pickup some cleaner tomorrow from autozone too, and do that.

 

So just went and got my brakes done by a trusted mechanic, and went ahead and got the two engine mounts checked out also. They werent cracked at all and the rubber was fine. Started the car and he had me rev it up between certain gears, and the engine seemed fine? Could it be some kind of belt or a compressor problem? Really dont want to take it to the dealership for 100$ just to tell me the problem, or could it still be the mounts???

 

As Charles mentioned, clean your MAF that could also cause a little vibration and cause idle to dance arround..

 

Okay just got done cleaning the MAF very good. Went on a drive and stopped a lot to check out the vibrations. And actually, a good amount of the vibrations went away!! It still does it, but not as bad to where I want to switch to neutral just to do completely away with them. That did the trick for now, don't have to worry about buying mounts as of now :D, thanks for the help guys!