I had the exact same problem and just solved mine yesterday. I had a cracked insulator on the #2 plug which created a carbon track that would short to ground, but only when accelerating. Replaced the plug and all is well!
'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
