no start periodically sebring 2010 2.4
 

Hi all. I have searched for this problem and didn't find anything just like it. Once in a while maybe once in a week or maybe two weeks ,hot or cold I go to start it and it don't start right up it just cranks . Ill let it crank for only about 15 seconds then let off the key ,wait 15 seconds try again and it starts right up like normal. There are no warning lights coming on and I hooked my reader to it and there are no codes at all . It has 34,000 miles . Other than that it runs good and is smooth . I don't have a maintenence record on it and never checked car faks So does anyone know what I might check ?