Hello David, There wasn't any work preformed on the Crossfire before this issue. The battery is the same battery we have been using for the last 3 years with no issues. My wife said she pulled up to a stop sign and a light on the right side of the dash flashed quickly and went off. She drove the car about a quarter of a mile and stop the car and turned it off. After 30 minutes or so she tried to start the car and it clicked and the car would start. I took the battery cables off and waited a few minutes and connected the battery and then the engine would turn over and start, run for a second and die. It would crank and run for a second and two times then nothing. Each time I disconnect the battery it repeated the crank, start, die. I had the battery disconnected when I changed the CPS. I hope this helps