DemonSVT...WHat your saying makes sense...maybe I'll try magnecors!
chrisilversvt...I've had the FMS plugs on for about a year and a half now and I just started to have this problem about 2 months ago when I changed to autolite plugs. I think what DemonSVT said makes alot of sense. Due to the extreme heat/Current..etc the wires just don't hold up as well as they should! I hope it doesn't happen to you but if it does then you'll know what it is!
Later!