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 |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.