DOES ANY ONE KNOW THE PROPER OPERATION OF THE AUXILLARY FUEL PUMP ABOVE 12000 FT, ON THE C320 W/ TSIO 470-C'S? BOOK SAYS
TURN TO ON, IMPLYING LEAVE EM ON?  HAVE HEARD CYCLE THEM ON ABOVE 12000, BUT THEN QUESTION BECOMES, AT WHAT INTERVALS?
THIS IS SAID TO BE ABOUT FUEL VAPORIZATION PREVENTION ABOVE 12000. ANY INPUT APPRECIATED.