Ever since day one with this new z, when it's warmed up, it will start and run for 1-2 seconds then stall. After that it will start every time. When the engine is cold, it will start every time on the first try. I figured i'd give it some time to break in, around 1000 miles or so, and if it continued, then it would be dealer time. Has anyone else had this problem? Also at times it will miss completeing the shift into 6st. gear. Any help would be great, thanks for reading.