seangboro30m

My mustang sometimes will stall when I pull to a red light. It is rare and its only when Idle is low. I have replaced IAC, starter. I am not as worried currently about this issue as much as I am worried about the fact that when it stalls sometimes it wont start. Occasionally when I try to start I hear one click and then I lose all car power. I think sometimes the theft light will still flash. I will wait a few minutes and then it will start again. I have checked connections to battery, used erosion cleaner. It is so random and I can not figure out why I am losing all power to car. The other day I came to a stoplight and it stalled at night. Light turned green and it wouldnt start, and I had NO power. I was a sitting duck. Opened door and power came on, tried to start, one click and no more power. Opened door again, power came on and it started. I am so confused. Any suggestions would be amazing...