Date:         Thu, 30 May 2002 21:35:45 -0700
Reply-To:     Brent Christensen <sbsyncro@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Brent Christensen <sbsyncro@HOTMAIL.COM>
Subject:      Re: Digitool data...what does it mean?
Comments: To: vgonman@MSN.COM
Content-Type: text/plain; format=flowed

Not an expert by any means, but here are my comments:

>any way here are the numbers.  First ones are at cold start.
>
>temp1= .96V
>temp2=.88V
>oxygenis jumping around a lot.  between -.05V to +.58V

O2 sensor reading is normal unless at full throttle - the lambda circuit is
constantly adjusting the mixture to keep it in balance. "tweak
-->feedback-->overcorrect-->feedback--tweak-->repeat"  Normal values are
from 0 to .60v as I recall.

>AFM ai bouncing between 1.45 and 1.53
>>
>warmed up (it is a miracle it stayed running this long)
>>temp1= .96V

If your Temp1 sensor is reading the same warm as it is cold, I would say
that is a potential problem.

>temp2= .19v-.23v
>oxygen=  all over the place -.13V to +.63
>afm= 1.41 to 1.48

AFM seems to be OK, though you would have to run around in different
throttle positions to be sure.

I would look at the idle control unit located behind the right tail light.
There are test procedures you can find in the archives and also in the
Bentley (sorry - don't remember them off the top of my head)

For more info on using the DigiTool, check out
http://www.loam.org/vw/Vanagon/DigiTool/

Brent Christensen
'89 GL Syncro Westy
Santa Barbara, CA


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