Tom, Yours is one describing the AFM eventual failure in simple terms. Thanks. I never looked inside the part and would think that the manufacturer had an obligation to have the part ( wiper ) which wears down to be a replaceable part. I understand that no two variable resistors can be absolutely identical, but I was involved in sophisticated production and dealt with resistors with no more than 5% difference. The design was allowing perfect adjustments. Hope that some heads on the list will eventually find the best and economical solution. Ark ----- Original Message ----- From: "Tom Hargrave" <thargrav@hiwaay.net> To: "'Arkady Mirvis'" <arkadymirvis@GMAIL.COM>; <vanagon@GERRY.VANAGON.COM> Sent: Friday, March 05, 2010 8:45 AM Subject: RE: AIR FLOW METER
> 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 > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.733 / Virus Database: 271.1.1/2718 - Release Date: 03/04/10 > 13:34:00 > |
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