This week, find out about the flatulent facts behind Rachel’s rank roadster. Her Saab story is enough to make your eyes water. Later, Click and Clack do their best to break up yet another perfectly good marriage. Andy calls for backup on a feud over steering wheel etiquette, but he gets nothing but gas for the fire. Also, a fed-up Yugo driver fights back against car-tipping pranksters. Plus: Patty one, skunk two. Find out if she can even the score in this week’s malodorous hour of Car Talk.