Date: Fri, 5 Jun 2009 19:26:53 EDT
Reply-To: Dvdclarksn@AOL.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David Clarkson <Dvdclarksn@AOL.COM>
Subject: rich running condition-still searching for problem
Content-Type: text/plain; charset="ISO-8859-1"
____________________________________
From: Dvdclarksn
To: mdrillock@cox.net
Sent: 6/5/2009 7:22:42 P.M. Eastern Daylight Time
Subj: Re: rich running condition-still searching for problem
I'm in Roanoke, VA. I work as a service advisor at the local Honda
dealership and have access to a variety of tools. I have been thinking of
purchasing a digitool if I end up keeping this engine. Tonight I checked the
connection at the AFM and also the boot. All that was ok. I applied some
di-electric grease to this connection, the O2 wire connection to the computer, and
several ground connections. I also checked for any trace of voltage at the
ground connections in the engine compartment and found nothing there
either. I'm thinking that I may replace the O2 sensor since it has 52,000 mi. on
it and VW says replace it every 30k right? I'm starting to run out of
ideas. Could the AFM tracks be dirty? the connection looked perfect. Am I
missing any ground connection points that might need cleaning/replacing? Thanks
for your help.
David
In a message dated 6/5/2009 6:58:21 P.M. Eastern Daylight Time,
mdrillock@cox.net writes:
It sounds like DigiTool time. The DigiTool allows you to look at the
readings of the sensors in real time, as the ECU thinks they are
reading. Testing the sensors themselves doesn't tell you what the ECU
sees. Where are you located?
Mark
David Clarkson wrote:
> I am still trying to track down the rich running condition on my 90
> Westfalia. I thought that the problem may have been related to the
ground path
> and have cleaned up the two ground points under the coil and have moved
> another ground connection from the coolant tower previously to a better
contact
> point. I also replaced a connection for the green wire that attaches to
the
> positive side of the coil. No change. I also put together the test
wiring
> harness discussed in a previous thread from the article on the Samba. No
> changes with the problem with the harness in place. I also tried
shutting off
> and then restarting the engine with the engine running to test the o2
> sensor per Dennis' suggestion. This did correct the problem for a few
seconds. I
> then disconnected the o2 sensor and still had the problem so I think
this
> rules out the sensor. I had previously found the correct voltage coming
off
> of the sensor (.1-.7 volts). The temp II sensor has been replaced and I
> have checked the wires to the sensor. I am going to check the throttle
switch
> to see if any problems are evident here tomorrow. I also am going to use
> probe pins to try and check for voltages at the computer from the temp
I,
> temp II and AFM. Any other suggestions from the list to check on this
> problem? The problem was an intermittent rich running problem and now
seems to be
> almost constant. Thanks gurus.
>
> David Clarkson
> 90 Westy
>
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