Sounds like a vac hose with the boost. You should get the kit from www.hosetechniques.com and learn to do it yourself. Diagrams are available at www.iluvmyrx7.com also downloadable workshop manuals. It also sounds like your coolant seals are going out. Keep your fingers crossed but I bet they are done for.

 

Thanks for links Fd3BOOST. Luckily the engine is still under warranty. Hopefully I can get a reman out of it.

 

Now your thinking Lincoln!