this car is misbehaving, most of the time it starts fine, then sometimes (like once in week) it doesn't fire. If I wait for like ten minutes and try again, it starts as if nothing was wrong with it. It is becoming unreliable because I cann't tell when this will happen. today It happened in town and I had seek alternative means of transportation, i was in a hurry and could not afford to wait. what could be problem?