Date:         Sat, 27 Jun 1998 16:52:39 -0700
Reply-To:     Tom Young <young@SHERLOCK.SIMS.BERKELEY.EDU>
Sender:       Vanagon Mailing List <Vanagon@vanagon.com>
From:         Tom Young <young@SHERLOCK.SIMS.BERKELEY.EDU>
Subject:      Re: new O2 installed - engine dies
Comments: To: Darrell Boehler <midwesty@TAOS.MIDWEST.NET>
Comments: cc: Vanagon@VANAGON.COM
In-Reply-To:  <01bda219$d79525c0$LocalHost@default>
Content-Type: TEXT/PLAIN; charset=US-ASCII

Darrell:

It seems to me your basic mixture is set too rich; you should be
observing the fluctuation around .5 volts with a hot, disconnected O2 sensor.


On Sat, 27 Jun 1998, Darrell Boehler wrote:

> [snip]
> After  1 minute the voltage climbs to  to 0.9 volts and stays there.
> The oxygen sensor is getting a pretty rich reading in default mode, my van
> seems to run ok in this mode but mileage would not as  good as normal.
>     With the van still running  if I plug the oxygen sensor  connector back
> together the voltage reading will stay at the 0.9 volt level  for 30 seconds
> . Then the digifant has discerned the oxygen sensor is working and has is
> detecting a rich mixture and by 35 seconds my digifant  has the oxygen
> sensor voltage readings bouncing above and below the 0.5 volt range. 0.5
> volts reading indicates a perfect mixture.  The bouncing of the oxygen
> sensor voltage  above and below  0.5 volts is the way all ECU's seem to
> operate.

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Tom Young               young@sherlock.SIMS.Berkeley.EDU
Lafayette, CA  94549    '81 Vanagon
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