i own a peugeot 406 executive saloon car. very nice car, but it has a problem which i cant really understand. the car's temperature rises rapidly within a couple of minutes when it is in a hold up or when the car is started initially prior to moving it. when driving it if the temperature gets very high the engine sometimes freezes up and then when u trottle down to move it jacks up very powerfully and then moves normal. its only when i am driving on the highways with no hold ups that the problem seems to reduce. pls if anyone could help me, what could be the problem.