Korution661
Member
I have a 2000 Expedition 4.6l 4x4. I have been blowing the spark plugs out every 2 or 3 months. The last one I blew out has blown 3 times within 6 months. I already rethreaded that one but failed to seal the insert, because it was the rear spark plug which I believe is number 4. Since there is hardly any room I could not hit it hard enough (I feel) to lock in place. Any advice on why it keeps blowing spark plugs out? I know that one I need to lock in place but what would make other do the same???
