You don't need to disconnect to fit a Vacuum gauge, you will have to cut the pipe and install a T-Piece.
Don't mess with the Servo one

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2011 Focus 3-door Zetec 1.6 TDCi.
Previous <img src="/images/graemlins/stemo.gif" alt="" />s - 2006 Panther Black & 2007 Red. Gone and quite forgotten <img src="/images/graemlins/lol.gif" alt="" />