Spark Plug changed, dying in idle.

I just recently bought a 2005 Mazda Rx-8 Sport Automatic with 72k miles on it, roughly 2 weeks ago or so. About a week ago my check engine light came on and had it tested. The issue was misfiring so I decided to buy new spark plugs and wires. Just last night I replaced my spark plug and wires, as well disconnected my battery for awhile. Once the process was done and over with I fired up my engine and let it ran for a good 10 minutes before driving away. However once i started to drive away everything seemed to be running beautifully until I came up to a stop light and my engine idled and died (First time happening in this car). I eventually had to get towed back to my original destination, and once we looked over it all once more, but we couldn't find a issue. My car did fire up and ran just fine in the garage, so being a dare devil I tried to drive it once more. Only got about a mile away before the same issue happened. Any help?