so like the description says, we have a '03 jetta TDI (manual), with which we have not experienced any serious problems... until now.
I live in Quebec City, Canada, where the temperature now is about -20 C (without windchill). This winter, my dad has noticed a large fuel consumption increase (about 40%), which has never happened during any other winter. But more disturbingly, last weekend we were driving out of town to go ice fishing, and while making a u-turn, the car stalled. Being half-way in the middle of an intersection, my dad didnt wait for the "orange-coil light" to turn off before trying to start the car. Still, it was surprising that it took about 2 minutes to get it started again. finaly, we got on the highway, but my dad had the gas pedal to the floor while we could barely reach 100km/h. The car then started to slow down. We finally went off to the side of the road, where upon stopping, the car stalled again. Eventually, after several attempts at starting the car, we got it towed to the VW dealership garage and left it there for the weekend. We thought that it might have been the gas pump, but on monday, my dad had to pick up the car, as the mechanics started it with no problem, and after running their computer through it, they found nothing wrong. For now its running fine, but still with large fuel consumption.
BTW, before setting out, we had a full tank of gas... uh diesel, so it couldnt have frozen. We also stopped by at the carwash right before setting out, which possibly might have frozen something besides the doors.
Anyways, we're not sure what to do now. But thanks for reading and any suggestions.