I bought a 2015 MKC reserve used in the spring. I am getting ready to go for service next week and need some help with my problem. I have the 2.0 ecoboost engine. When the car is in drive and you are stopped the engine idles rough. The tachometer needle bounces and the engine shutters the car as it is about to stall out but then the rpm go back up and you get a little bit of a lurch, but lucky my foot is on the brake. No service or warning lights have ever come. I am going in for service next week and I know there will be no codes in the computer. I have 22,000 miles on it. Has anyone had this issue or heard of this problem? I'm looking for some suggestions so I know what to tell the dealer next week. Thank you for any help anyone might be able to shed on this problem.