Q: What does the ignition timing control system do?

The ignition timing control system is an important part of the network of emissions control systems on your car. Really, it does exactly what the name implies – it manages the timing of the engine to help reduce the production of harmful gases. These include carbon monoxide (which toxic, although not a pollutant), NOx, and various hydrocarbons. It works in conjunction with other components like the exhaust gas recirculation system and your catalytic converters to drop emissions as low as possible.