Geza, two things: 1) if warm idle speed >1400 rpm, ECU kills fuel until idle
drops;  my '84 does this regularly as throttle is binding and will not close
completely. and 2) are all other vacuum lines and fittings in good shape and
tight?

AAR pretty reliable.  I have my own way of checking an AR but I have been
flamed by gurus on the list for posting it.

John
----- Original Message -----
From: "Geza Polony" <gezapolony@SBCGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, November 20, 2006 11:01 AM
Subject: Aux. air regulator shot? If so, what effect?

> Hi folks,
>
> I did the simple "hose pinch test" for the AAR in my '84 1.9, stone cold,
> and there was no effect on RPM. (Bentley 24.28) I assume this means the
> AAR
> is stuck open, as the van starts instantly and runs and idles well when
> cold.
>
> However, once warmed up, the idle fluctuates, and once in a while the
> engine
> runs extremely lean on acceleration.
>
> What effect could the AAR sticking open have on running conditions when
> warm?
>
> Are AAR's fixable?
>
> I ask this because a quick search of the vendors reveals almost none in
> stock, and the one I did find (at a place called Rapid Parts--?) costs
> almost $80.
>
> This raises another, more general question: what do we do when this kind
> of
> part is NLA everywhere?
>
> Thanks,
>
>
> Geza
>