Got a bit of a problem with the car, at motorway speeds it keeps kicking into limp home mode. It did it 4 times in a 20 mile run yesterday evening. I can't think of what it is. The boost sensor was cleaned the same day by Drinky (checked the plug too after the second time it went) so I doubt it's that. The strange thing is though if I cane it through the gears hard, it doesn't happen. It only happens when the car is cruising at motorway speeds.
Any ideas? Bit stumped.