Date: Tue, 13 May 2003 18:55:10 -0400
Reply-To: Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject: Re: Upgrading Digijet to 3-Wire O2 Sensor
In-Reply-To: <OF217D7016.9B9E4D43-ON85256D25.0050852C@lvs.dupont.com>
Content-type: text/plain; charset=us-ascii
This is a conversion I do frequently. It does not help any for going
closed loop after a cold start since engine temp is the first
consideration for going closed loop. However, it does help for winter
operation and if the engine idles for long periods. If replacing the
catalyst, I also use the later cat and relocate the O2 sensor there.
Helps to get it out of the way of the wheel spray. There is also a
deflector shield that clips on to it to deflect water and air flow. The
part # for the deflector is 035-906-274.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of Jay L Snyder
Sent: Tuesday, May 13, 2003 10:50 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Upgrading Digijet to 3-Wire O2 Sensor
Anyone have a feel for the difference in warm-up time required for both
the
1-wire versus the 3-wire O2 sensors? I am thinking around town
driveability and mpg might be improved if the O2 sensor kicked in
sooner.
The question is, "How much sooner?" The 1-wire takes 4 or 5 minutes
from
stone-cold? What about the 3-wire? Is it a lot faster or "Not worth
fooling with" faster? Now that I have my O2 sensor display wired up, I
can
see what the sensor is putting out. The 1-wire seems a little marginal
at
idle speeds with low exhaust flow, especially after barreling along and
then suddenly slowing to idle. Maybe the 3-wire would help out?
Jay
'85 Westy
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