91 3.1 stalls while turning around

hi i have a 91 lumina with about 60,000 miles on it and i have had this problem twice so far. My problem is that when i was turning around on a tight street, my car stalled out. i was going pretty slow and had the steering wheel cranked all the way. come to think of it, it was all the way to the left both times. after the car stalled out both times, i rolled a little bit down the street to get the wheels straight then put it in park, turned the key to the off position, then started it up. it fired right up each time. both times this happened i was delivering pizzas. thats alot of stop and go driving thats just really strenuous on the car. i have also noticed that it idles somewhat crappy and when i start it up, it usually revs pretty high for a second or two then goes back down to the crappy idle. anyone have any ideas on what i could do to fix this?