The progression of ohm readings from the AFM flap movement will not be linear.
They will vary but won't follow any predictable pattern (other than be
repeatable).

-Dana-

Bess's Buddies wrote:
>
> We tried this on our westy, and we still got really strange fluctuations in
> the ohmeter when opening up the baffle. In fact, it would start to go back
> down! (And here it's supposed to be a potentiometer!) This is what our bus
> has been doing.. under throttle with vacuum (load) it would just lose all
> hp and not go over 30. Idle fine, and be fine in the low end of the
> throttle/rpm's
>
> We tried to move the contacts. We tried cleaning the little radiused board
> they mount to with electronic cleaner... but we still got wierd readings.
> like started at .49 to 1.5 to 1.9 to 1 to 0 (full throttle) and it wasn't
> smooth either... kinda jumpy and acting inacurate. Just like how it ran.
> Full throttle it would just gasp, and slow down, but we could drive it as
> long as we didn't go over 2500 rpm. Plenty of torque in the low end too.
>
> I'm curious if you can come up with a way to fix it. Have you tried your
> meter on it yet?
>
> We ordered a new one from the Depot, hope to see it in another day or so....
>
> Glen & Ri
> 67 Singlecab - Klaus
> 87 Westy - Bess
>
> At 02:30 PM 12/18/2001 -0800, you wrote:
> >Sorry, I'm sure that this has been covered MANY times and I found LOTS
> >of posts about the AFM in the archives, but I didn't find out exactly
> >where it is. I searched the bentley, but couldn't find it in the Fuel
> >Injection part of the book. Where is it and what should I seal it up
> >with after it take it apart?
> >
> >What I plan on doing is rotating the board in it so that the sensor will
> >move on a new track and also cleaning it with alcohol. Is that right? I
> >also am getting a new cap, rotor, spark plug wires and OXS to eliminate
> >any other possibilities. What else should I change or look at? I think
> >that cleaning grounds (where are they all) and making sure that
> >everything is connected will would be good as well.
> >
> >My original post is below.
> >> Hi all. I have a problem with my '85 vanagon that seems to be getting
> >> worse with winter.
> >>
> >> History
> >> ----------
> >> Last winter, my vanagon developed a severe "hiccup" when I was cruising
> >> at 2900 RPM. It doesn't do it all the time, but it does it a lot now
> >> that it's not summer. During the summer it is not nearly as bad, but it
> >> still will do it on occasion. What happens is when the tachometer is
> >> passing 2900 RPM it will give a terrible sounding and feeling lurch. If
> >> I'm accelerating hard, it will usually just do it once assuming I pass
> >> through 2900 RPM quickly.
> >>
> >> � If I'm trying to cruise at 2900 RPM (any gear) it will continue
> >> lurching.
> >> � It doesn't occur at any other engine speeds.
> >> � Engine temp or the time I've been cruising don't seem to matter.
> >> � Actual Speedometer speeds don't matter...just RPM's
> >>
> >> Thanks!
> >> Aaron
> >> '85 Vanagon 250,000 miles
> >
> >An additional problem that I have been having is when I come to a stop
> >sometimes the van will die as soon as I put in the clutch, or will
> >hunt - almost stalling and then back to 800rpm, then stall completely.
> >I looked in the archives, but there are so many hunting/stalling fixes
> >that I wouldn't know what to start with first.
> >
> >If you want I would be glad to look at things in the archives so that
> >you don't need to revisit topics. I just need a direction to go in.
> >
> >Thanks for the help!
> >Aaron