Date:         Fri, 5 Mar 2010 02:45:58 -0600
Reply-To:     Tom Hargrave <thargrav@HIWAAY.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Tom Hargrave <thargrav@HIWAAY.NET>
Subject:      Re: AIR FLOW METER
Comments: To: Arkady Mirvis <arkadymirvis@GMAIL.COM>
In-Reply-To:  <A6AB7AD4B16F4ABE916DCB0D86D9E97F@Guenther>
Content-Type: text/plain; charset="US-ASCII"

Ark,

Problem is it's a variable resistor that continuously changes value as you
are going down the road based on airflow through the meter. And the value
changes by a wiper sweeping back and forth across a carbon track. Eventually
the wiper wears through the carbon track & when this happens the unit gets
intermittent and then eventually fails. And since this is a wear item they
will all eventually fail.

Some mechanics have figured out how to fix some of bad ones by relocating
the wiper so that it sweeps through a new track but once you wear a track
across the carbon the values are not exactly where they were from the
factory.

I've often wondered if the working parts from inside another airflow meter,
maybe something more readily available, could be retrofit into a failed
Vanagon airflow meter. Bosh manufactured millions for a lot of different
cars and some of the parts have to be common.


Thanks,
Tom Hargrave
256-656-1924

Our Web Sites:
www.kegkits.com
www.stir-plate.com
www.andyshotsauce.com


-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of
Arkady Mirvis
Sent: Friday, March 05, 2010 1:56 AM
To: vanagon@GERRY.VANAGON.COM
Subject: AIR FLOW METER

Expensive part! Are failures common? What causes the failure? What are the
symptoms and consequences of AFM failure? Please name the sources. Ark
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