Hi guys, I was wondering if anybody can help diagnose a overheating issue I have. I have a Diablosport Intune and a Jet 180 tstat. With the Diablo tune and fan setting at 185/195, the car would run at 87 C (190 F) all the time. I live in the country and rarely encounter heavy traffic. About 4 months ago, I got a Johan email CMR tune. It was at this time that I was doing a job in the city and was getting caught in peak hour traffic and I noticed the temperature fluctuating. When idling in traffic, the temperature would rise as high as 112 C (233 F) and then once I drove off it would settle back to 190. We discussed this and set the fans on 185/194. There was a slight improvement but still the temp would regularly go over 212 in traffic even with the HS fans on. What set the alarm bells ringing was a few days ago, there was an accident on the freeway and traffic was at a stand still. I was watching the temp gauge going up and up until it almost hit the red which is 250! I was about to switch the engine off when it started going down and stabilised around 210. I quickly did an illegal u-turn to get the car going again, 190 again no problems. The temp also goes up high after a long drive and I stop and idle for a few minutes. I can hear the HS fans going but the temp still keeps going up. I've checked the coolant level and its on the min line while its hot but I don't think adding a bit of coolant will solve the issue. Is it a software or hardware issue. I'm planning to go back to the Diablo tune to check if it's a software issue and top up the coolant. Any advice would be appreciated.