ok I don't quite get it there must be a sensor issue or something...when the weather is below idk 80 degrees outside my car runs great runs rather cool actually even all the way up to like 79 80 degrees....but today it was 93 degrees outside and the car overheated all the way till the coolant was bubblin...i don't get it....radiator always has fresh coolant I change it almost like oil lol..fresh oil and filter change both oil and filter were topped off at the time of the occurance that was the first thing I checked of course...the ect sensor is brand new the thermostat is brand new...the sensor for the temp gauge is brand new...the cooling fan operates and was on at the time of the occurance...any ideas guys?? a shot in the dark but the IAT sensor?? the car was NOT pinging by the way it never does thank God!!