high idle, 3000rpm idle Options

[slotty008]

Hi guys ,
I just hope that someone could help us with the idle of my '75 2.0. I have the car for almost 7 years now and idle was always a little bit too high. We have been trying to correct this but it got worse instead of better. We changed the distributor to a 123 ignition, we changed all the vacuumlines, the AAR has been cleaned out and the idle screw is completely closed.
The car starts at 1600rpm when cold and once it is warm it goes to 3000rpm and the idle stays there. The car pulls very well , a lot better better than when I just had it. (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/confused24.gif)

[slotty008]

Update,
This afternoon I got a call from my mechanic. We have some progress, thanks to all your comments.The AAR is not working properly.When he shuts off the AAR line , the idle drops to 1200rpm when cold and 1600rpm when warm. That's already better but still way too high.He thinks there's a leak in the throttle valve or maybe the axle is worn. I don't know if these are the appropriate terms since I'm not English speaking, but I hope you understand what I mean.
He already tried to repair the AAR but it still doesn't work . He proposes to eliminate the AAR and fit an electric valve that I can shut down when the engine is warm. Is this a good idea? Hope to hear the comments from the experts.
To be continued.
Robin