I took the might Prado on a 550km journey to see family and to do some skiing over new years and that involved me having to tackle some fairly large hills. I was quite nervous with the 2lte track record but I think the on average -10 weather and my light foot kept me out of the red and it took on the mountains like a champ (while maintaining 22mpg). I did however notice that after coasting the truck as soon as I let my foot on the throttle again it would sputter and puff blue for a couple seconds then clear up. I have noticed this as well on a couple wheeling trips but it wasn't as obvious as this. Anyone have a similar issue come up?