If you have 22* at 2200rpm, you don't have enough initial timing in the thing is my guess. It's going to want about that much timing at idle speed. It's already in the advance at 2K rpm. Put a timing light on it and see if it's dropping timing out as you reduce rpm. if it is, keep turning it back in as you reduce idle speed. See the bottom paragraph for another way to do it as well.
If it runs at 2000 rpm and no vacuum leaks, turn the timing up at that point to about 35*, then see if you can adjust the idle down.