Date:         Fri, 10 Nov 2000 06:44:49 -0600
Reply-To:     Darrell Boehler <midwesty@MIDWEST.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Darrell Boehler <midwesty@MIDWEST.NET>
Subject:      Re: Engine o2 out of spec
Content-Type: text/plain; charset="iso-8859-1"

Hi Dennis,
     I use an 81 Cal system in our 78 westy. Test fuel pressure, test /
clean the injectors (be sure you have a balanced set).   Check for exhaust
and  vacuum leaks, check compression,  and  that all tune up items and
timing are proper.
    It is then possible to adjust the afm (air flow meter)  main spring
tension /  mixture using the o2 sensor voltage or a co meter.  This has been
written up seveal  times in the past. Checking the archives will yield much
information.  If you need more information drop me a note.

Darrell

----- Original Message -----
From: "Dennis Bergey" <dbergey2@HOME.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, November 09, 2000 10:34 PM
Subject: Engine o2 out of spec


> My mechanic and I have been working on my engine temp problem which I
> didn't have by the way until I installed my CHT gauge.  Suspecting that
> maybe my engine was running to lean and therefore hot we started checking
> and found with the o2 sensor connected the system was to lean at 2000 plus
> rpm.  Disconnected it is much richer and almost out of spec.  Here is my
> mechanics explanation who is by the way a very reputable mechanic in my
> opinion here in Santa Barbara County:
>
> When co is set to factory spec. by the book you disconnect o2 sensor with
> engine off, start engine and adjust as necessary then shut off reconnect
o2
> restart engine and recheck co, it should stay with in spec.  If not other
> causes of this problem could be a vac leak, timing, fuel psi, fuel
> injector, and head sensor, which all check good. Your co goes too lean at
> cruise speeds, I have herd of other shops installing a resister in the o2
> wire connector to bring the co back to spec with all systems operating. We
> need some leads on the resister or if this is due to something in the
> electronics we may be missing. Note this is a California version with
> electronic ignition and o2 sensor system. most other models have points
and
> no o2.
>
> 1980 Westfalia Vanagon FI all stock engine.
>
> Any idea's list?
>
> Sincerely,
>
> Dennis R. Bergey
> Systems Manager
> Santa Barbara Museum of Art
> Santa Barbara, California
> Web:www.sbmuseart.org
> AOL IM : Mr Bergey
>
> The people have spoken.  We just don't
> know what they've said yet.
>
> President Clinton.  7/8/2000.
>