She runs great at all times other than the old parking lot crawl speed. Anything 5 MPH or under she seems loaded up, almost like she is getting too much gas, happens whether she's cold or hot no change. Idle is perfect anything above a crawl she is great, but very annoying in parking lot for sure. Never stalls but seems likes she wants too, but never does.

Any ideas to look for?

Many things can cause this, sticking egr valve, bad or dirty isc, as you said maybe slightly too rich.