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Date:         Wed, 1 Jun 2011 09:47:30 -0600
Reply-To:     William <grateful@SWCP.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         William <grateful@SWCP.COM>
Subject:      Failed emission test
Content-Type: text/plain; charset=us-ascii

After all the years being on this list as a lurker, I have a minor problem with my 1984 Vanagon.

I failed the first emission test because the idle RPM was above 1200 during the idle test. The HC reading was only 56 and the CO was only .24 during the high RPM test. So I do not suspect engine wear as the culprit. Also the engine was completely rebuilt in 1998 and I have put less than 50K miles on it.

This happened a few years ago and the problem disappeared after I replaced the O2 and temperature sensor(not the dash sender). So I replaced the O2 and temperature sensor yesterday.

This time, the idle RPM improved but was still flaky. After the high RPM test (2500), the idle RPM remained too high until the accelerator was bumped. And then the idle would slowly creep up but not above 1200. The emission test equipment was not happy when the accelerator was momentarily bumped and it aborted the test.

Now I suspect the AFM. Many years ago(15) I had idle problems and the mechanic determined the spring in the AFM was worn. He somehow tensioned the spring so the spring applied more force. This fixed the problem until I replaced the AFM.

I am sure this problem and solution is in the Vanagon archive but I honestly have never needed to search it. I do not even know where the archive is located.

If some kind person would direct me to the archive, I would be very grateful.

Also, the Vanagon mechanic retired at Hans Wittler's Automotive and now they do not service Vanagons. Anyone in ABQ know of a good Vanagon mechanic?

Thanks!

-- William grateful@swcp.com

505 440 0760

Too many people spend money they haven't earned, to buy things they don't want, to impress people they don't like. -Will Rogers


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