The Case of the Faulty Converter
RAY: No, it wasn't the converter. What was wrong was that his timing was off. And the reason that his converter was glowing red was that the combustion of the gas was actually taking place in the first part of the exhaust system. Because the timing was so far off that he wasn't getting combustion in the cylinders, rather he was getting it where? In the exhaust system!
TOM: And what's right up front there?
RAY: The catalytic converter. That's why he also had no power, because the energy of those explosions was going into turning that pipe and that converter cherry red, and not going into pushing the pistons down.
[ Car Talk Puzzler ]