looks like we are all back at school on this problem
ignore that this article is about bad idle on a zetec
have no idea why or what . but it says in "rubber T peice "--there is a Pulse air system in the design
this link will help you find your way around the engine bay with pictures
http://www.gomog.com/allmorgan/ZetecIdleIssue.htm
pulse air system explained - ford is near the bottom
http://what-when-how.com/automobile/...em-automobile/
pulse time the 2nd
http://www.smogtips.com/air.cfm
how to remove pluse system from a Zetec ..good picture reference
http://www.fiestaturbo.com/forums/fr...ec-e-vt101727/