This week on Car Talk, life in the Big Easy is proving to be anything but that for Betsy and her truck. Since relocating to New Orleans, her Toyota has taken to spewing gas all over the place. Her mechanic's first guess? Mud chiggers in the fuel line! Entomology also comes into play later on, as Ray uses an ant colony to help explain why Nancy's Nissan won't start in cold weather unless she turns the heater on first. Also, Rob has to replace a Camry door that won't open; Susanne's DIY thermostat repair created a host of other problems, without fixing the one she was trying to address; and Daniel and his wife are struggling over the question, "Whose arm rest is this?" All this, plus the truth about wood-chip fired engines, and lots more, this week on Car Talk.