I get intermittent code 13 and sometimes 44. Exhaust smells sometimes a little metallic and like rotten eggs. I have replaced spark plugs, spark tower, boots, IAC, O2 sensor, TPS sensor, Crank Position Sensor, MAP sensor, mufflers, fuel pump, fuel filter, in tank fuel sock, all vacuum lines, and fuel injectors. Car ran better after IAC, fuel pump and fuel injectors were replaced, but still throws code 13 and sometimes 44. Fuel economy sucks