My vehicle was in Park and idling fine. I heard a loud pop and a little rattling immediately following. Car was idling strangely. At first I thought it was coming from a semi on the road but I suspect it was my car. I drove for about a mile and put in Park again. When exiting the car, the engine smelled like it was burning. What could it be?

 

is the check engine light on?

you don't say what engine you have.

sounds like a belt may have broken.