Ken and list;

I have the combined switch and found a couple of problems with it.  First the
connector was hanging loose -- hooked up but dangling -- down below the
manifold (supposedly this van had only been serviced by VW dealers and a
highly regarded local mech specializing in fine German autos and high bills).
 Once I found that and did the multimeter test I found that I needed to do a
little tweaking.  Problem is that one of these places over-tweaked.
Over-tweaked to the point Bentley's screw 3 is well rounded inside.  The
exterior of the head looks considerably thinner than screw 2 -- like somebody
attacked it with pliers.

I checked with a local parts guy and he has the throttle valve switch.  I'll
pick it up today and may have a chance to pull the throttle body later this
week -- we share the use of a big garage at work and Rick's Jeep needs some
attention.

While I was exploring I checked all the vacum hoses and fuel lines and they
all look surprisingly good.

Thanks again for all the help and advice.

Chuck