1995 318ti ign problem
 

ok , my wife parked her car, it just happends to be 30 below. real mean winter this year . ontario canada. next morning , starts up than runs like crap. coil bank starts smokin and begins to melt oround#3 plug wire. installed new coil . same problem. starting to blister in the same area. i thought perhaps bad ground. its fine and added another just to make sure . any idea what to check next, thanks jean guy