Date: Fri, 5 Jun 2009 10:01:32 -0400
Reply-To: Marc Perdue <mcperdue@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Marc Perdue <mcperdue@GMAIL.COM>
Subject: Re: rich running condition-still searching for problem
In-Reply-To: <c7d.4c1cac28.375a2403@aol.com>
Content-Type: text/plain; charset=ISO-8859-1
David,
Did you check for leaks in the AFM rubber boot? Cracks in the boot
are a little hard to find . . . Mine was actually loose at the AFM
and this took care of a lot of my problem. My van has been running
more smoothly than any time since I had the new engine put in, after
getting the valve lash set properly. This might not apply in your
situation as my engine is one of Boston Bob's big valve engines and
the lash is different than normal specs. However, the valves were set
incorrectly for either engine . . .
Marc
On Fri, Jun 5, 2009 at 3:32 AM, David Clarkson<Dvdclarksn@aol.com> 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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