Date: Tue, 6 Mar 2001 07:41:20 -0600
Reply-To: Mark Ingalls <ingalls_mark@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Mark Ingalls <ingalls_mark@HOTMAIL.COM>
Subject: Re: More O2 Sensor confusion...
Content-Type: text/plain; format=flowed
I find it invaluable to know what my 02 sensor is doing. I made a digitool.
A person can get the same information by piggy-backing a light gauge wire
into the 02 sensor connection. Then bring that wire up to the drivers area
and use a digital multi-meter to watch what your 02 sensor is sending to the
ECU. You will need a ground for the multi-meter also. You can watch the 02
sensor in closed or open loop depending on how you hook it up of course.
Be careful the wire does not interfere with the engine cover closing,you
don't want exhaust fumes in your van. Also put the multi-meter on the dash
so you are not distracted and wreck your Van.
With my digitool, once I saw that the AFM, Temp 2, etc, where all ok, I
leave it hooked up to the 02 sensor all the time. I have seen a stumble
because of low 02, and I have seen the engine surge at idle because it was
running too rich. I find it quite interesting.
Good Luck,
Mark Ingalls
>From: Chad <groch@WORLDCHAT.COM>
>Reply-To: Chad <groch@WORLDCHAT.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: More O2 Sensor confusion...
>Date: Mon, 5 Mar 2001 23:57:38 -0400
>
>I originally asked the question about the O2 sensors today and how my
>crappy
>idle and hesitation disappeared when I disconnected my O2 sensor. Well
>today I took it upon myself to replace the O2 sensor and low and
>behold......the new one makes it run WORSE. The idle stumbles really bad.
>When I coast to a stop with the clutch pressed in the van almost stalls (ie
>all the leds come on on the dash) but keep running really rough. I noticed
>while coasting to a stop the tach drops really fast all the way down to
>~400RPM and settles around 750-800RPM with the sensor connected. When
>coasting to a stop with the O2 sensor disconnected the tach drops slower
>and
>settles smoothly at 1000RPM. Any suggestions what I should do now????????
>Will my fuel mileage go to hell if I drive with no sensor?????
>thanks,
>Chad 85GL
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