When i go to start my car sometimes it well just turn over and wont start?

Question

My car turns over but sometimes it just keeps turning over and wont start for hours at a time, and its nvr hot.

Answer 1

what kind of car is it and engine size

Answer 2

You question is so vague it almost funny.  SO many systems can be the problem you won't get any good answers until up at least put the make year and model.  Sometimes aftermarket alarm systems can do that.  When experienced techs get a car in for a no start problem we always look for an aftermarket alarm...