When the temperature gets to be 85 degrees or hotter outside the 4runner will try to die anytime you stop and idle. I have to put it in nuetral and rev the engine to keep it running. It also smells strongly of gas when I park it after these episodes. It does not do this during the winter months so I know it is directly related to the heat. I've taken it to the dealer three times and it's still not fixed. Help please.