Been playing grease monkey to night on our old 99 fodr windstar. There is a factory defect in the rubber washers, rubber gaskets and two of the vacuum hoses, seems if they get oil on them they will deteriorate, and the valve cover is made wrong and cause all kinds of rough running. Well finally found a forum that showed just what to replace and then found advanced auto even sold a whole kit. Took about two hours to replace all of the parts and she is up and running like a top :yahoo: :yahoo: . Now to replace two sway bar links and a cv joint boot this weekend. I don't mind working on cars if you know just what to replace and with all of the electronic bull any more it is hard to tell.