I have an '85 1.9l with the vacuum advance/retard distributor.  I realize
the two vacuum ports are connected to different sources of vacuum--the
advance (which is teed in with the fuel pressure regulator) comes right off
of the center "manifold" box and the retard comes off of the throttle body
somewhere (venturi?).   I put my vacuum guage on the line that goes to the
advance port on the distributor.  For some reason, the timing wants to
advance and the engine runs faster.  This I don't understand at all.  How
could disconnecting the advance side cause it to advance further? I have
15" Hg at this point.  Yes, I have the lines correctly installed.
I would appreciate any ideas on this and possibly a quick theory on the
purpose of the vacuum retard.

                                                        Jay