Our car just died while we're waiting for the green light. so we put it on PARK then re-start it. then while we were on the store and started backing out from the parking lot, it died again. last week my husband changed the oil. when we tried to use the car the following day, the car started, but as soon as we backed up from the parking lot, it died again. until now, our car won't start. we changed the battery june, 2012. the starter, alternator and timing belt are new. in your opinion, what seems to be the problem with our car? thanks in advance for your help.