I have a 2015 Ford SHO with a Livernois stock tune. I have Aeroforce gauges that give me the exact data for my car. I went on an errand today and 10 minutes in, I saw my temperature gauge was at 190. Within 10 more minutes it crept up to 230. I installed a 160 degree thermostat when I gave it the Livernois tune, back in 2015. Since then, my temperature would be pinned at 174 degrees - no variation. Anybody have any idea what could be causing the temperature to rise? I haven't had a chance to really look at it, since it just happened tonight, but I did check my antifreeze and it looks good. The radiator fan was working properly. In the beginning of the winter, I did set my tune back to stock, due to problems from the Livernois tune, but I really never noticed a fluctuation in temperature until today. Could it be that the thermostat is stuck closed, or the stock tune doesn't turn on the fans as early as a 93 tune? I'm puzzled, so any help would be appreciated. I think tomorrow I will try and start the motor, take the radiator cap off, and see if the thermostat kicks in at 160.