Actually, it doesn't. When it is warm out but the engine is still cold it acts like it is going to stall when I stop, but never really does. Once the engine warms up it works properly.
I tracked down at least one bad relay valve and replaced it, but it is still not working properly. I would pull the EGR valve and try to clean the pipe (There is a post on it somewhere) or replace it but someone beat me to it and cross threaded one of the bolts. I really don't feel like breaking it off and having to pull the engine to replace it, so I leave it alone.
I think I have a bad sensor giving the system a false reading, as when I bypass the vacuum line mess and plug the EGR valve straight into the vacuum line coming off the engine it works fine. The relay valves just aren't opening properly. If I had the electrical schematics I could probably figure out exactly what is wrong.
Work is having me home for a few weeks instead of traveling so I might be able to track down the issue.