Car Talk #2208: Bike Helmets in Cars & Carburetor Issues

Puzzler Returns and Book Endorsement

• 💡 The Puzzler segment is back from its summer hiatus, promising a challenging riddle for listeners.
• 📚 A listener shares an enthusiastic endorsement of the "Car Talk" book, detailing how it provided a much-needed sleep aid during a long flight.

Carburetor and Engine Stalling Issues

• 🚗 A 1981 Mazda GLC stalls when turning right, potentially due to a sinking carburetor float or an interrupted electric idle circuit.
• 💡 Another theory suggests a bad motor mount could be twisting the accelerator cable, affecting the carburetor linkage.
• ⚙️ A 1984 Toyota Tercel exhibits an uneven idle and stalls frequently, likely due to a gummed-up choke mechanism that needs cleaning.

Transmission and Drivetrain Concerns

• 🚚 A 1972 Chevy van has a noticeable jolt when shifting into gear from neutral, which is considered a sign of positive engagement rather than a problem, provided the engine idle speed is correct.
• ⚠️ If the clunk is severe and the idle speed is confirmed to be correct, the U-joints on the driveshaft are suggested as a potential area to check, though the caller had them replaced previously.

Intermittent Check Engine Light

• 🚨 A 1985 Oldsmobile Delta 88 has an intermittent check engine light accompanied by a loss of power, which has been difficult for mechanics to diagnose as it doesn't always store a trouble code.
• 🔧 The advice is to leave the car with the mechanic for an extended period, ideally overnight or for several days, to allow them to experience the symptom firsthand and potentially diagnose it.

Social Dilemma: Bike Helmets in Cars

• 🚲 A couple wears bike helmets while driving for perceived safety, a practice initiated by the husband, a former automotive safety engineer.
• 🤔 While the idea has some logical appeal for head protection, it draws significant attention and strange looks from other drivers, leading to social awkwardness.
• ❓ The couple seeks the hosts' opinion on whether the practice is paranoid, weird, or a good idea, and if they would champion such a safety campaign.