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Subject:Re: update on decreased mileage after tuneup problem
From:Tom Young
Date:Wed, 10 Jun 1998 07:14:48 -0700

> In a message dated 98-06-09 20:11:07 EDT, raven@HALCYON.COM writes:
>
>  O2 sensor is working and is not grounded or anything. I can attach a
>  voltmeter and watch it do its thing as the ECU adjusts mixture.

But, is the output of the O2 sensor indicating a rich mixture?  If the
mixture is set more or less OK then, with the O2 sensor disconnected from
the ECU, you should see rapid and repeated fluctuations above and below
.5 volts.

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