[s-cars] Identify-a-part

[jimk at spotgraphicsinc.com]

Hello,
I need help in identifying  a part.  My ETKA still will not install.
The part in question is a small gold-ish colored cylinder a few inches
under the ISV with an electrical plug in front and coolant hoses at the
top and the back of the cylinder where it has a plastic connector
piece.  The cylinder is about 2" in diameter and about 4" long.
Currently I have a coolant leak at the connection to the top hose
outlet.  Tightening the stock clamp did not help, neither did putting  a
new clamp on.  When I tweak the hose back, it dribbles coolant.  It also
does this after shutting down a hot engine.  It does not drip when HOT
or COLD, just while cooling down, but will dribble out about a pint or
so every time.
Any ideas what this thing is?
Thanks,
Jim