Date: Fri, 16 Mar 2001 18:02:00 -0600
Reply-To: Larry Alofs <lalofs@ENTERACT.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Larry Alofs <lalofs@ENTERACT.COM>
Subject: Re: CO adjustment
Content-Type: text/plain; charset=us-ascii
Todd Last wrote:
> I replaced my AFM and now need to adjust the CO. Is this something that
> a garage mechanic can do, or is this something that I need to take the
> van to a shop for.
>
> I guess there is no such animal as a cheap CO sniffer.
>
> Todd
> '88 Westy
Very interesting question. Considered it myself a few years ago when my 84
failed the Illinois smog test. I wanted something that would at least tell
me whether things were getting better or worse when I tried various
adjustments.
I bought a home type CO monitor with a digital display for about $30 or
$40. Unfortunately it took two minutes to take each each reading. It was
also designed for much lower CO levels than you find in exhaust so I had to
try to find a way to dilute the exhaust by a reproducible amount. I spent
way too much time fooling around with aquarium pumps, hoses, bleeder and
mixer valves etc. without much success. Eventually I discovered a big
vacuum leak in the intake area and after I fixed it the O2 sensor voltage
started to act sensibly. Passed the smog easily and abandoned the sniffer
project. C'est la vie.
Larry A.
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