I have a friend w/ an '83 911SC he recently purchased. The car has 56000 miles on it and seems to be in great shape. On two occasions, while driving the car, the engine simply shut off. Both times were at fairly low rpm's. It can be restarted immediately and runs fine. Any ideas?

 

Sounds like a loose electrical connection. Does it shut off quickly or does it sputter? Is the car in gear at the time?