Rob,

This is a bit of a reach but it may be at least part of the problem.  On
top of the throttle valve there is an array of springs and levers.  The
main throttle return spring is helical and is located on the actual
throttle rod. On my 91 there is a second spring which attaches to a
lever near the top of the throttle valve and is attached to the mount
the fuel pressure regulator is bolted to.  I removed this spring once to
assist with a sticky throttle, and low and be hold my van began to idle
high on occasion-- that's the reach.  I lubed the throttle valve area
and it went away.

BTW the top lever is unused, it was the actuator for the EGR valve on
models so equipped, as near as I can tell from the Bentley diagrams.

Date:    Sun, 5 Aug. 2001 20:16:21 EDT
From:    Robert Tippey <Tippos@AOL.COM>
Subject: warm idle prob.

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Hi List
       I know this subject has been beaten to death, but I've tried everything
       I can think of. My '91 idles fine when cold but when it's warm it goes
       up and beyond 1K. I also have an original 40K mile car, which, of
course
       doesn't have this problem. I have been systematically swapping
all of
       the suspect components as follows: idle stabilzer valve, relay unit
       (behind the right tail light), air flow meter, throttle body, ECU,
distributor
       as well as replacing the throttle cable, and still, the problem
persists.
       I godda be missing something, but what? All I can say is, if I
shut it
off
       and restart, it returns to normal until I drive again for a while.
Also, I can
       put on the brake and slowly let the clutch out while in gear
until it
goes
       down to normal and it will hold that way until I drive for a while.
And
       sometimes if I drop the accelerator pedal suddenly, it will
return to
       normal....nworble? Could there perhaps be a problem in the vast and
       sometimes, I think, vascuous vacuum system? Anybody with similar
       probs.? They're all unique, I know.

Cheers
       ROB