I saw the same thing when I played digifant recently.  It looks like a
little "blow-out" valve or reed valve.

Looking inside my unit, there does not appear to be any sort of "Baro"
sensor - let alone any sort of sensor located near the port in the brain
box.

I think this is a vent of some sort...

Which opens the question up to Barometric Sensing.  Lots of FI systems have
a baro sensor, or something to tell the FI what the air density is (hot wire
systems just look at the wire...)  What about digifant II?

Does anyone have a clue regarding the listee discussing a "port" on the side
of the idle stabilizer?  (He reported cleaning out the port and improving
some idle related problem...).  I had my stabilizer out last week, and the
case is solid.  No vents, and I looked from the inside and the outside...

Roger Bowman - bowmanrp@ earthlink.net
Live Smart.  Think for Yourself.  Transform the Future

----------
>From: Alistair Bell <albell@UVIC.CA>
>To: vanagon@GERRY.VANAGON.COM
>Subject: digifant II has a barometer was: Mileage at altitude
>Date: Fri, Oct 29, 1999, 2:00 PM
>

> I mentioned it before, but here goes again...Digifant II has a "barometer"
> on the side of the brain (at least mine does).
>
> Alistair
>
>
>
>>Shouldne the O2 sensor keep the mixture right at altitude?
>>
>>At 09:04 AM 10/29/99 -0600, Richard A. Jones wrote:
>>>I thought altitude compensation was handled by the fact that
>>>the less-dense air moved the AFM vane less and so requested
>>>less gas to be injected.  Not so?
>>
>>Bill (SE Arizona) (Bill@freeholder.com) HTTP://www.freeholder.com
>>----------------------------------------------------------
>>It ain't what you don't know that hurts you,
>>it's what you do know that's wrong.
>