Pantera #5253 has been running rough lately and dieseling after shutoff so I decided to swap out spark plugs before getting further into timing. I had a set of Autolite Iridium 3924’s and when I pulled out #5, the plug was wet and fouled and reeked of fuel. But spark plug #6 was the odd one, as pictured. The center electrode is kicked over to one side. Gap was set on all of them to 0.043.
I replaced all the plugs with Autolite AR3924 copper plugs, gapped to .035. I’m running a 383 striker Ford Windsor V8 with Edelbrock Victor Jr. aluminum heads. The car runs smooth again, at least as smooth as can be expected with a mild cam in it.
What do you guys think happened here? I’ve never seen this before.
