1. It gets good gas mileage.
2. It may lose power that is needed for
normal driving and emergencies.
3. It pollutes the air.
4. The engine could stall when you are on the road, causing a traffic problem.
Are you really serious? I hope you aren’t going to be a mechanic. #2,3,4 are true. Maybe you can figure it out now.
If this is your homework, you have no business studying any automotive related.