Autolite makes motorcraft plugs, just so you know. And I say you got a couple bad plugs. Several other members have had them for many, many miles with no issues, including myself.

Shawn Clone Jezabel- 1999 SE Sport V6 MTX- Severly wounded, comatose Silver frost/Black Exterior-Midnight Blue Interior The Firecracker- 1995 Mystique LS V6 MTX stock and backfiring like a rifle shot I have 3 loves, my God, Brittany, and my Car.