I don't think the system's set up for that
Because then in HTH rooms, for example, you would never turn WEP off with 0 fuel burn.
I think WEP burns and eng temps are independent, and to LINK them would cost tons of man-hours and thousands of lines of code.
Plus fuel burn is fuel burn. That doesn't affect engine temp. Just an artificial means to limit the ranges on an map where fields are so close to each other.