well everyday I warm up my car in the morning and its about 30ish degrees outside. I warm up my car for about 10 minutes sometimes even more, and it idles at around 900 - 1000 rpms. But when Im in driving right when I get into second gear the rpms shoot up to 2000 rpms when in neutral and stays like this until the car turns off. Why does this happen?
Could there be a bad sensor or something?