Does anyone know how long the denso plugs are supposte to last? I have about 17k on mine and am getting a little cold start stumble. The stumble feels like fouled plugs. It comes and goes, and it just started a couple of days ago. I think its time to buy another set. I havent pulled them yet, just thought i'd ask the group. And this is in dennis' forum because i got them from him, and i feel he knows best.

Thanks everyone..

Oh, and thanks dennis for taking care of us.