Morris Minor Owners Club

what is a vacuum guage used for in the engine department? i have one in my spares pile with a short 4" pipe on it and wondered if it had previously been fitted to my car. just wondered where it went and why?

It's used for measuring the vacuum! ;)

It goes on the inlet manifold, and you run a pipe into the cabin. You can see the inlet pressure (vacuum) when driving and as well as slight diagnostic benefit it also gives you an idea how heavy your right foot is. VW fitted them to various cars, but labelled them as an "Economy Meter" - Same thing, just a fancy marketing name

It's a gAUge - throw it away - no sensible use whatsoever.

it also gives you an idea how heavy your right foot is.

If you have a spare gap in a gauge display they can look quite good IMO

[quote="Packedup"]It's used for measuring the vacuum! ;)
quote]

will have a look on the car as everything else in the boxes i have seem to have been on the ( or a ) car at some point

i assume it was kept as it is nice and shiny

they are handy for telling how much has said for your right foot is down..also it tells you how well your engine is running/setup...if it flickers madly then its not set up right ...on normal tick over it should be in the level of 18-22 at a constant reading not flickering higher the better within tickover range

I KNOW how far my right foot is down - without a gauge to tell me.

Hello all,

it was used as a diagnostic tool long before electronic instruments came along, although the small size gauges that fit the dashboard are not as accurate. (Which is true of any gauge)

Alec