GREENSBORO, NC–Attempting to conceal his ignorance of car repair, area resident Dave Snell, 39, nodded knowingly Monday as mechanic Bill Kreuter explained the precise nature of Snell's automotive problem. "He was telling me that the car had, like, a faulty alternator plug," Snell said. "So, you know, that's something that definitely needs to be fixed." Snell said his risky bluff almost backfired when Kreuter asked him how he gaps his plugs, to which Snell responded, "About the usual amount."