Hello, I have a 2017 Nissan Sentra Turbo and on idle RPMs it goes up and down a tiny bit like literally 50-100 rpms is that normal? It doesn’t do it all the time either sometimes it does sometimes it doesn’t. Also when I open and close the windows engine goes down to about 500 rpms then back up? I took it to dealership and they told me that was normal. What do you guys think?