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