Update: The plug looked fine when I pulled it. I swapped the #4 and #3 plugs and put back on the stock Motorcraft coil, then reset the ECU. I drove the car last night to the Nets game and it felt better. Although I didn't after the Nets lost 
'96 Contour - Zetec/MTX 130+k mi. White/tan
Tints, 2.25" custom magnaflow catback, tach cluster
'86 Mustang SVO Red/Sunroof 80k orig. Needs work
Cone filter, E6 Manifold, '01 16" Pony Wheels
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