It's been so long since i took off my upper intake I can't remember where all the vacuum lines go. I'm now running a box upper and have been running all the vacuum lines. I know the TB and PCV get vacuum from the intake. Do you actually run a vacuum line from the intake to the vauum tree? If not where does it get vacuum from?
Thanks

 

Yes you have to run a line to the tee. You will need it for your brake booster to work. Also dont forget the fuel regulator needs a vaccum source. I think I have a vaccum diagram on my PC, I will look around and post it for ya.

 

http://www.veryuseful.com/mustang/tech/engine/
everything you need to know!

 

perfect. thanks guys.