Hi all,

The little white resistance element can be moved on it's mounting screws if
your careful. Then the wiper will contact a fresh area of the resistor
surface.
I have had to carefully open up the mounting holes to get some to move
enough to be effective, but it has almost always saved a badly worn one.
Mark

----- Original Message -----
From: "JM/CO" <jmerritt2@CAPECOD.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, July 10, 2003 3:49 PM
Subject: Re: AFM resistance test

> 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
>