I have had this car for only 2 months. I use it to commute back and forth to school/work. I went to deposit a check through the atm so I left my car running for about 5 minutes. When I got back in my car I heard a humming noise, when I looked up at my gauges everything was down, but my car was still running. Not knowing what was wrong or going on, I pulled over, parked, and turned the car off. When i tried to start it up again it wouldnt start. The mechanic who worked on it installed a new ignition module and battery and still cant get it to run without dying. It has a rebuilt engine sitting @ 159XXX miles. Please help