Re: [T3] cold start behavior - update

[type3@comcast.net]

OK FI gurus out there - updated info:

1. new cylinder head temp sensor
2. new air intake temp sensor
3. new voltage reg - bosch 30-019
4. new bosch generator.
5. disasembled and cleaned the aux air regulator - again.

Pulled a couple plugs (bosch W8AC) installed 3 weeks ago when all this shit started - plugs are black and sooty.  Exhaust smells like it's running rich.
Pulled air hose off aux air regulator and the additional air does in fact raise the RPM when egine is cold. However this thing behaves the same way when warm. 

I took Dave's advice and submerged it in hot water and it does in fact tighten down when hot and close off air flow.  What I'm still stumped on is the fact that the aux air reg seems fairly closed even when at room temp - which is when it should be more open.  Have not found any documentation on what the little + and - signs mean on the little spring.  

Aside from the aux air reg...i'm concerned about the black plugs and not so great fuel economy.  What other components tell the computer how to handle fuel mixture?  Seems like i've hit just about everything.

Thanks in advance.
PD
> > What makes me suspect the AAR is not adjusted correctly is that when I had it
> out on the work bench - it was room temp (68ish) and yet the spring seemed to be
> applying pressure to close the valve - not open it.
> >
> > This seems opposite to what it is supposed to do - open when cold, close when
> hot.
> >
> 
> Stick it in near boiling water - it should be closed by then, and you could see
> if it does what you expect.  Mine was well caked with oil grime, but I believe I
> did adjust it a fraction at the time.  It can't hurt much - just not work as
> well as it should, meaning you get to pull it out again and readjust it.
> 
> Dave.
> UK VW Type 3 & 4 Club
> http://www.hallvw.clara.co.uk/
> ------
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