This week on Car Talk, former Red Sox pitcher Bill “Spaceman” Lee plays a round of Stump the Chumps. Find out if Tom and Ray helped get Bill’s BMW running, or thrown one way over the backstop. Elsewhere, Jeff promised his girlfriend he’d get a driver’s license this Summer. The calendar has turned, and Jeff is still sans license, so what he needs now is a good excuse. Also, Ashley loves her Beetle, but it may be killing her with CO poisoning; Chris wants to know how big a dope slap to give her husband for keeping the heat on during a six-hour drive in 96 degree temperatures; and can Tom and Ray do any better diagnosing a broken lawnmower than they did on electric brakes? Well, they couldn’t do worse, right? All this and more, this week on Car