Kia Soul 2015 100,300, recently bought it used and I bought it at J and R auto sales sioux falls south dakota
I took the car to the auto store and asked them to check the engine light and they said a misfire. 
The car runs good but when I start to accelerate pass 30 mph and as I try to push the gas peddle more down it accelerates a little low and then it jumps up a little and goes to the speed I want it to go to. When I go on the highway and I start going to a higher speed like 65 to 80 it starts to have a whistle sound when I drive on a higher speed. 
Even when I put it on cruise control, it shifts and then it double shifts, like it won't stay on the exact speed I want it to be. The acceleration is a little low.