What would cause my car to not slow down when I hit brakes or speed up
I was going down highway, had car set on cruise control when I went to hit my brakes it wouldn't slow down, so I tried to speed up it wouldn't do that either. Then my rooms would go from 0 to 60 then 0 to 60. I pulled over and shut car off for few minutes what could be going on with my car. Please help me.