I had the above vehicle in last week that was holding its revs up(3000) when you hold the clutch down(when moving).On coming to a standstill revs drop to normal idle,though on occations this can be unstable.
Following checking the advise of the archives the throttle pot voltage was adjusted down to 0.7v(gently twist the end of the throttle spindle),reset ECU and hey presto a different car!
Now need to figure out why the powersteering switch isnt altering the idle though it has been replaced.