I have a 2000 chevy metro LSI 1.3L L4 engine when i start my car up it vibrates it not a little vibration you can feel it and also when i go above 45mph my car make a loud grinding noise almost like metal on metal what the heck is going on here?
Drive straight to a mechanic. Do not pass GO, and do not collect $200. Keep it slow. There is not even enough info to guess at what is wrong, but grinding sounds and metal-to-metal sounds are the expensive, dangerous ones.