I have a Duratec, and have been using the Autolite plugs. also I ran i sparkplug re-thread tool through today and that went through with ease, however the plug still did not seat itself, i tried two new plugs, both did not work, also the old plugs electrode was crushed, the haynes manual says that this means there is some sort of object in the engine, and i guess that could have done something, i will try to post a picture of it, any other ideas anyone?
thanks for the replys!
