Date:         Fri, 2 Apr 2004 16:57:45 -0500
Reply-To:     Kevin <antelopewesty@ADELPHIA.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Kevin <antelopewesty@ADELPHIA.NET>
Subject:      Digitool and driveablity issues
Content-Type: text/plain; charset="iso-8859-1"

Hi Volks,
I just rented and installed the Digitool computer from Volkscafe.  I email
them with some questions but figured I shoot a copy to the list for more
words of wisdom...


First here are the symptoms of the van. 1987 Vanagon with digifant all stock
4spd.
Usually when raining or humid (sometimes dry)  the van start to surge and
bog down and loose all power. (normal this is after it has warmed up but not
always almost always does it on a restart after a 10min drive) If I step on
the clutch it will drop to a very muddy idle of about 400 then if I give it
some gas but not full throttle the rpm decrease and will sometimes stall.
If I give it full throttle sometimes it will clear it out. A restart always
fixes the problem some times for the rest of the day sometimes for 1min. If
I disconnect the O2 sensor (new splice in type spliced by my mechanic)  It
will won't normally lose all power but tends to surge while driving and top
speed limited to about 40-50mph.

Now the reading of the Tool
TPS  light is green at first start up will go green for full throttle but
never goes back to green again for idle but always works on full throttle.
I will adjust again to see if it helps. Next the O2 sensor readings  the 02
sensor seems to be working fine according to your instruction book my reads
are between .33 and .93 but the 02 ground is reading a    -.4v consistent.

Can I run the tool with the 02 unplugged to see if the ground still
read -.4v ?  That way I can isolate it to the harness if it still read -.4v
or the sensor if it reads the correct 0v. Would I be correct in assuming
that. Also I don't want to hurt the tool by running w/o the 02 sensor. Any
suggestions you have on these issues would be great.
Thanks for your help,
Kevin
87 Westy
Burlington VT