when i turn my car on and its in idle i guess it sort of vibrates. kind of feels like an earthquake coming from the steerign wheel and underneath me... all around me actually.

people say it could be the ac or something which i dont think thats it becuase i never use my ac and other peopel say it could be my brakes but it doesnt vibrate when i brake.

the vibration is most noticeable when my car is on and im jsut sitting but i also feel it while in drive....

motor mounts maybe??

 

welcome to the forum. Does the vibration follow while you are going thru the gears to drive,Do you have any loose spark plug leads ( wires ) does this clear up after it is hot and at idle? and yes it could be motor mounts. you can do a visual check to see how much it is off center.