1991 Spider has a mystery problem. It loses power while going down the road and then just dies. I have to pull off to the side of the road for safety reasons. It will start right up every time. It might happen 2 or 3 times a day, or it might go for 4 or 5 days and never happen. My mechanic has looked at the ignition switch, coil, all the electics and fuel related parts. Several parts have been replaced. I would really like to have some clue as to what is causing this problem. My life is being consumed by this nagging problem. Please helpl.