I own an 03 V6 Mustang. Recently we've been having some issues. As I'm driving down the road the car will seem to reset itself and kind of restart. We noticed the negative terminal was sparking, I fixed that issue and the car seemed to work perfectly after that. But last night it started doing the same thing again (it was fixed for about two weeks with constant daily driving). Also, it seems to slip in and out of gear at times, I don't know if it's connected or the transmission itself is slipping. Hoping for an easy fix because I definitely don't want to get rid of the car. Please Help!