About a month ago my car did this. Then again today. Starts up fine. Went for a ride about 8 miles to a friends house. Turned off car went inside and stayed about 20 minutes. When I came back out started car and it was running rough. Like it was flooded out or missing. Went around the block and when out on the main road gave her some gas. As it built up some speed the car cleared out and ran fine. On the ride home it ran perfect. Stopped for gas shut it down 5 min. Start back up same thing but not as bad. Back on main road give it a little gas and cleared up again. Ruled out MAF as I replaced that last time when it happened. Seems to do this randomly. Any ideas. Thinking plug or may Oxy Sensor. What about the cam sensor ?