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Phoenix, AZ 85008
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That is a vacuum can or reservoir.
The actual vacuum system is unknown. However, the picture looks like it is from a vehicle from the 70s and a full sized Ford or Mercury with a Windsor block engine.

Anyway, the possible vacuum systems are: (in no particular order)
Power door locks
Speed control
Concealed head lamps - however that reservoir may be larger
Or some other vacuum controlled circuit

The purpose is to maintain a vacuum signal during periods when engine vacuum is low. Like dropping the pedal on the right to the floor. This would cause engine vacuum to drop to near zero.


15 Posts
Discussion Starter · #5 ·
It's a 1978 LTD. Station Wagon. I was really lucky to pick it up.
One owner from new in the US, the body is in excellent shape just needs paint. Underneath is perfect. It needs a few bits. The trans position selector cable has snapped, and the back of the instrument panel has started to crumble around the instrument panel lights, not a big deal. The headlining is the only thing wrong, it's fallen to bits. Rockauto do a new one for $180 dollars.
Well pleased with the car.
I also have a 1976 Dodge Royal Monaco, 70 thousand miles from new, plus a 93 Buick Roadmaster wagon which I have been working on for a year or so.
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