1996 Buick Regal, Stalls inermittently and takes 2 minutes or so before it will restart. This was happening about every three days or so. Recently became more frequent as weather is warming. Finally, last night I had driven about 15 miles fine and then the stalling began and continued about 5 times for the remaining 5 miles of my commute. Do you think this is coil related and how can I isolate which coil is breaking down?