99.5 V70XC, 200k, all of a sudden temp gauge starts bouncing up and down, then it starts having difficulty starting after it gets even slightly warm. You can start it once when it's cold, then you best not shut it off until you get to your destination, and not be in a hurry to leave there real soon. And after it starts, the fan comes on immediately and doesn't shut off until a few minutes after ignition off. Anyone have any ideas?