Help needed for 01 I30 stalls

[emrahp]

I bought this 2001 I30 a couple months ago and I've had a lot of problems. Kinda expected it since it has 191k miles on it though. Some were fixed with a new IAC, ECM, MAF sensor, and O2 sensor. The only issue I haven't been able to figure out is why is occasionally stalls after driving it for a while. It will randomly stall at a stop light or while I'm parking, but then after I restart it, it doesn't do it for 5-10 mins. I watched the Live Data on my OBDII reader since no codes were coming up. FuelSYS1 and 2 both occasionally say OL-Fault instead of CL. If it goes back to CL in time, it doesn't stall, but if it stays long enough, the car stalls. Any ideas of how to resolve this issue???