I had this same problem about a month ago. I checked the plug first, and the wire second. No spark. I then replaced the coil pack, problem solved. Easy fix, it took me about 20 minutes to swap out.
'96 SE 2.5 V6 ATX, Willow Frost Metallic
10-hole '84 Mustang 15x7 wheels w/ Dunlop 225/50-15's
CSVT air intake components with K&N cone filter
Optimized TB
Gutted Pre-cats w/MIL eliminators
