Your mechanic dude probably knows more than I do.  But my mechanic dude told me (when he replaced the AFM last year) that cleaning the thing would take the carbon off, and thus damage it irrevocably.  He did tell me that some use your trick of moving the wiper, but he tried that with mine for an inordinate amount of time, and did not charge me for the extra time.  I told him, just get a new one.  He did, and it has been fine ever since.

He attributed the "Vanagon Syndrome" I was experiencing to the worn AFM carbon track.  My camper is a 1991 model, newer than yours, but the AFM is the same one or very similar I think.

DMc

---- "Mike "Rocket J Squirrel"" <camping.elliott@GMAIL.COM> wrote:
> My mechanic dude suggested the the cause of the engine's periodic but
> brief loss of power during grade climbs last week might be a dirty spot
> on the AFM track and suggested gently cleaning it with a pencil eraser.
>
> I opened it once before, a few years ago, to move the wiper to a fresh
> bit of track. I'll open it again to clean the track.
>
> Is the pencil eraser trick good enough, or would it benefit to use some
> kinda cleaner?
>
> --
> Rocky J Squirrel
> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> 74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
> Bend, OR
> KG6RCR

--
David McNeely