This week on Car Talk, Emily dared to correctly diagnose her male friend's car problem (the horror!) but did her automotive intelligence ruin a potential relationship? Elsewhere, Ted’s solution to his van’s leaky exhaust may win a prize for modern sculpture, but will it also kill his engine? Also, Linda needs to use a hair dryer to start her car in weat weather; and from the “be careful what you wish for” department, Jeff wants to get his reluctant 18-year old son to start driving or risk never getting a date. Finally, yet another philosophical theory that explains Tom and Ray: “learned ignorance.” All this and more, this week on Car Talk.