I had the same problem. Awhile back something hit the underside of my car driving on the highway. I heard a thunk. My wheel vibrated and I was concerned. My mechanic did not see anything under the car and just did a tire rotation. Now, over a year later, one front tire shredded. I took the tire off and immediately noticed a bent rim. My mechanic should have noticed or looked for that too. I am in the process of new tires, balance and alignment. New mechanic too!
loud, and shety muffler
could be a broken engine mount.
It is idling. This is hard for an engine to do smoothly.
Could be time for a tune up.
The most common cause is tire out of balance or bent wheel.
If the tires are properly balanced plug tires should not cause a vibration.
Normally a bent wheel or tire out of balance.
Adding heat causes gas molecules to vibrate, increasing the gas volume or pressure. A car with a damaged valve will usually vibrate noisily while operating. Tuning forks are designed to vibrate and thereby create a particular pitch.
Cars vibrate.
Heat!
Yes, a catalytic converter can cause a vehicle to vibrate and stall. It will do this when it gets plugged because it causes the fuel mix to be disturbed.
A 1994 Corolla engine may vibrate if the motor mounts need to be replaced. The motor mounts can be purchased at any auto parts store.