I am also having problems with my idle.
Usually  (but not always)  my engine will not idle when I start up in
the morning.  By the time I get to work  (40 mins)  the engine will idle
at a stable 1000 RPM .    When I leave for home at night almost always
the engine will light right up and idle at 1000.

I have replaced the temp 2 sensor, cleaned and moved the track of the
AFM  and adjusted the throttle switch according to the Bentley so that
it "clicks".

any suggestions?

John McLean   87  Vanagon   GL    (211,000  miles)