I started the cobra up sunday with no problems and let it run in the driveway, when temp hit around 180 it started to get rough like a miss and it would shut off. I left the car off for about and hour while i ate dinner, went back out and started the engine with no problems, drove it for about 20 minutes, everything was perfect. I pulled it back in the driveway sat for a minute, temp hit 180 and it started to miss again , at least it sound like a miss to me. When it starts to miss it gets to 200 quick and then i shut it down with just the fan running.