High Idle, but only when driving or warm., Cold, and sitting... 1000 RPM. Driving...1400 ?? Options

[MikeInMunich]

Greetings from Munich gentlemen!

As seen in the title, my car (1973 1.7 converted to 2 liter, D-Jettronic F.I.) idles at 1000 after starting and letting it sit. When I take it out in the road it quickly changes to 1400. It still idles at 1400 when stopped after the car is warm.

1) I think my AAR (auxiliary air regulator) valve isn't working at all. Disconnecting the vacuum hose, the idle shot up to about 3000 and covering it with my finger 100% it went back down to where it was before I had detached it from the AAR. So the AAR should have been OPEN as the car wasn't warm yet, but it seems to be closed 100%.

Strangely, the idle only goes up after the car is out on the road / is warm...but not even yet near normal operating temperature.

I'm thinking the AFR is leaning out under load and after the car is fully warmed up. (IMG:style_emoticons/default/idea.gif) I currently don't have AFR or CO values. I will have the CO measured cold and after warming up in a few days.

Here's another issue and question fer y'all. While looking into the bay yesterday I noticed a substantial leak at one of the fuel injectors. I didn't mess with it much (checking the seating of the seal) but after I drove the car and it was warm, I looked again and it had stopped leaking. I thought it could have something to do with temp and fuel pressure (IMG:style_emoticons/default/confused24.gif) Starting up the car cold this morning however, I checked again, and there was still no leak. Does anyone have any idea what could cause an apparently intermittent leak like this? Perhaps just fudging with it gently got a seal to sit better, but I'm skeptical about that.

Thanks for your feedback! (IMG:style_emoticons/default/beerchug.gif)

By the way, I do know about this thread on Rennlist, which is a tremendous resource:
http://members.rennlist.com/pbanders/djetparts.htm

Mike in Munich