Joe,
 
I'm sure I'm checking it right.  = Behaves the same way both by checking at pins 2-3 (center two)
and by touching the board.  =
 
Here are the values, in kohms, measured = both at the pins and by putting a probe on the carbon track where the wiper are = contact would be (and closest to the taps, because the carbon track obviously = has its own
 resistance:  Here's what I get:
 
          &nbs= p;    pins 3-4    on carbon track
 
closed      500           &nbs= p; 500
1          &nb= sp;  1100           1100
2          &nb= sp;  1100           1500
3          &nb= sp;  1100           1500
4          &nb= sp;  1100           1800
5          &nb= sp;  1100           1200
6          &nb= sp;  1000           1100
7          &nb= sp;    950           1000=
8          &nb= sp;    900            1000
9          &nb= sp;    800            1000
open          300           &nbs= p; 700
 
 
----- Original Message -----
From: Joe Romas
To: Steve Gough
Sent: Saturday, May 12, 2001 = 2:05 PM
Subject: Re: AFM Testing?

Steve,
 
Something dosen't sound right! It = should keep rising in a steady line with no dips or rises and keep going up untill = it reaches the end. Are you metering it at the pins or somewhere on the board?
 
Joe
----- Original Message -----
From: Steve = Gough
To: Joe Romas
Sent: Saturday, May 12, 2001 = 2:56 PM
Subject: Re: AFM = Testing?

Thanks, Joe.
 
What's wierd to me is that neither = unit shows a steady increase or decrease
in resistance as the flap is = opened.  More like a "hump", i.e. resistance slowly
rises until about half open, and = then falls again.  It's lowest at either end of the
travel.  Make any = sense?
 
Steve
----- Original Message ----- =
From: Joe Romas
To: Steve Gough
Sent: Saturday, May 12, = 2001 12:59 PM
Subject: Re: AFM = Testing?

Steve,
 
The one with the drop-outs is = bad! The resistance should rise steadilly as you move the arm from idel = position. When the computer gets to the "drop-outs" it sees it as a lot of = air and adds more fuel and that's when things go south as far as running go.
 
Joe
 
----- Original Message ----- =
From: Steve = Gough
To: vanagon@GERRY.VANAGON.COM
Sent: Friday, May 11, = 2001 4:06 PM
Subject: AFM = Testing?

Dear List,
 
I'm trying to tell if I need a = new air flow meter for my '86 Vanagon.
 
Can anybody enlighten me on how = resistance should change
as the vane moves?  My = manuals (even Probst) are vague.
I have two AFM's in hand.  = Both show similar resistance changes
with movement, but one seems to = have some drop-outs.
 
Couldn't locate anything in the = archives.
 
thanks,
 
Steve