Just do what i do. just don't answer or post anything. when he starts a post. After reading the frist few post of his. That did it for me. I don't even open his post anymore. If he wants to talk about building cars then lets talk. If he want to talk alot and say nothing. Then don't answer his post.
It dosn't matter how many post he has. But listening to you guys he just like to start things and keeps it going.
As long as you give him the attention he's looking for, he'll keep doing what he's doing.