My 84 Westy had the 1.9l motor, and I too chased the same issue for years!
I also had a "no hot start" issue, which my "master mechanic" was never able
to solve.

As it turns out, after reading a few things... the motor's valve were out of
adjustment.
Before going any further, I'd recommend making sure the valves are properly
adjusted.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
David Boan
Sent: Monday, January 11, 2021 12:10 PM
To: vanagon@GERRY.VANAGON.COM
Subject: throttle switch

Hello Vanagon Types

For two months now I have been working on the idle stall issue with my '85
Westy, and I think I am closing in on the cause. The problem is the engine
not idling after running at high throttle.  It otherwise idles great and
runs great.  Timing is right on.  After running at 2500 rpm or more and then
stopping, the idle bounces around and then eventually stalls. Turning it off
and back on eliminates the problem for the moment.

Following the idle switch testing procedure posted by Ken at VanAgain, I
found a problem with the low throttle switch.  With the engine off, I get
clear clicks at full throttle but none at low throttle.  Adjusting the
switch did not change it.

The next step would be checking resistance at the switch, and that is where
I have a question.  My setup does not look like the sketch in Bentley, and I
am unclear where to connect my multimeter.  Does anyone know if the switches
are under the throttle body and if I need to remove the throttle body to get
to them?  Or, if there is a connector I can use instead of removing the
throttle body?  I see several candidate connectors and not sure which is the
one I want.

On the other hand, if there are no clicks, does that definitely mean a bad
switch that should be replaced?

This engine is a GoWesty 2.3 on a 1.9 system.

Thanks in advance for your suggestions.

Dave B
Boise