Have a caravelle V6 2.8L 2003 model. On a long trip, say more than 100km on hot days only (40C) the van just cuts out. Ill bring it to a stop, put it in park, leave it for a couple of min and it will start again, go1-2km and the same thing will happen again. I have taken it to VW dealer who replaced the speed sensor. Went ok until hot weather came back again (this time of year, northern australia), same thing is happening again. Drives me insane, am to worried to take the kids on camping trip or any long distances. The Lambda warning light is usually on at this time as well. Short trips around town, no worries. I usually have to wait until sun goes down or temp drops for things to return to normal. Van is definatly not over heating. Has to be some idiot sensor or fuel vacume or something really simple. I now live 2000km from nearist VW garage, desperate. Any ideas anyone? HELP! Jila