Sure could use a vacuum diagram for my '93 940. regina, auto, just bought and someone has the manifold vacuum lines crossed up, I have two lines that pass thru the firewall(where do these hook up on engine?) one from the map sensor going to the manifold, one from the cruise pot going to lft strut area (cruise works) PCV T going to manifold, I don't see a check valve (should I have one?) every thing else looks right. thanks