Yes, that's why I replaced the switch a year ago...turned out the cam was
worn to the point where proper adjustment wasn't possible. Be sure you get
the cam when you buy the switch...at the time I bought it, van-cafe was
bundling them for the same price that others charged for just the switch.
That could have changed, so best to shop around.

Two tips that worked for me...to get the proper gap, I adjusted the
eccentric screw with a .004" feeler gage in place on the idle stop screw
until I heard the click and my multimeter showed a change from closed to
open. When I tightened the lock screw, the gap was 0.003", so don't be
surprised if tightening affects the gap. Also, once you have it set, go back
and check it periodically to make sure the gap holds...that was my downfall.

Since you have to (at least it makes it much easier) take off the throttle
body to install the new switch, take the time to clean the innards with carb
cleaner, and inspect the throttle plate and pivot shaft for looseness as
these can affect the operation of the switch. I know you said you already
cleaned it, but I included that to present a complete procedure for the
archives.

Good luck!

On 5/25/06, Clint Kolda <clint_kolda@yahoo.com> wrote:
>
> My idle switch clicks closed when the throttle is completely closed.  I
> can not adjust it to open to the Bentley specs.  The switch does not open
> until the throttle is opened ~.030"-.050"  If I adjust this to the .004"
> spec, the switch never closes.  I've cleaned the switch, cam and throttle
> body.  It seems to me that the switch should open and close at the same
> point.  Being new to Vanagons I assume this is a sign that the switch
> assembly should be replaced.  Is that a correct assumption?  I thought I'd
> check before dropping the $70 on a switch.  Thanks.
>