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Date:         Thu, 10 Jul 2003 16:49:12 -0400
Reply-To:     JM/CO <jmerritt2@CAPECOD.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         JM/CO <jmerritt2@CAPECOD.NET>
Subject:      Re: AFM resistance test
Comments: To: Jeff Hammerstrom <speakerdesign@MSN.COM>
Content-Type: text/plain; charset="iso-8859-1"

Been there, done that-- I would strongly suggest that you remove the AFM ( not difficult ), clean it up in some gas, remove the cover, and carefully examine the thing. The little white resistance element is clearly visible, and wear is readily apparent. As you can see when you examine the critter, the resistance increases ( or decreases ) in steps, rather than in a continuous manner. I would love to locate a source for these elements, which were manufactured by Bournes, a company that specializes in variable resistors. It is this critical component which fails. The rest of this ( rather expensive ) unit will last forever. Chuck '83 Westy '84 XJ-6 ----- Original Message ----- From: "Jeff Hammerstrom" <speakerdesign@MSN.COM> To: <vanagon@GERRY.VANAGON.COM> Sent: Thursday, July 10, 2003 3:52 PM Subject: AFM resistance test

> Does anyone know what the resistance should look like as you move the air > flat and measure between pins 2 and 3? Bently says the resistance will vary > but that's not much info. Is a linear or log progression? I know it's never > going to be closed while the engine's running so is there supposed to be a > step in resistance as it moves from rest and then a progression until it > fully opened? From what to what values? Any help here would be appreciated, > mine may be bad. > Thanks


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