Turn it all the way in, then out about 3-1/4 to 3/12 turns.  You should be
close.

Hotch
Philly
86 Vanagon GL
89 Jetta GL

John Clavin wrote:

> Well, after trying everything that has been mentioned on this list about
> cures for the infamous stumbling problem, it finally came down to a bad O2
> sensor and a worn carbon track in the AFM. The O2 sensor was relatively new
> with only about 25K on it, but replacing it made a big difference. I fixed
> the carbon track by loosening the screws on the substrate and sliding it
> forward so the wipers follow a new path. The old path had white substrate
> showing through at the high wear point in the middle.
>
> Throughout all this fumbling around, however, I took the liberty of
> cranking open my CO adjustment screw in a moment of desparation and
> environmental weakness. Now my question is, should I just put it back in
> about the same place it was, or is there a nominal starting point from
> which it is set before final adjustment with a CO meter? I do not have a CO
> meter available and am only interested right now in avoiding drivability
> problems until I get everything shaken down and am sure there are no
> further problems.
>
> Thanks in advance,
> John Clavin

--
Richard Hotchkiss
http://www.hotstrings-inc.com