I had a similar problem toward the end of last summer. Black sooty plugs and soot around the end of my tailpipe. I changed the plugs and plug wires and that seemed to clear up the problem. I had three seasons on the originals. But it was soon after that my igniter started giving me problems. I began to wonder if the igniter was the problem all along.

Cody

I was born a long ways from where I was supposed to be. - Bob Dylan