Could be time for a tune up.
loud, and shety muffler
It is idling. This is hard for an engine to do smoothly.
You probably need new rotors
could be a broken engine mount.
out of balance
I just put a new battery and alternator in my car, but when i put it in gear or start slowing down to stop..the car die out. Also the brake light is continely on.
The most common cause is tire out of balance or bent wheel.
The force of friction between the tires and the road surface is what primarily causes a car to stop. When the brakes are applied, the brake pads press against the rotating wheels, generating friction that slows down the car.
The force that causes the car to stop by opposing its motion is friction. Friction occurs between the tires of the car and the road surface, creating a force that resists the motion of the car, ultimately bringing it to a stop.
Normally a bent wheel or tire out of balance.
If the tires are properly balanced plug tires should not cause a vibration.
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.