I was driving to go skiing in my 1985 300TD wagon. The car, as always, ran like a champ. When I got to the road to the ski resort at 6,000 feet, the car lost power. You could stand on the accelerator and hear a whining noise from the turbo, but the car would barely go. When we left, as soon as I got below 6,000 feet again the car ran like a champ. The next morning we drove to the resort again, same thing. What would cause this and how can I fix it?
Bill Brewer
Tehachapi, California