How Does an Ignition Control Module Work?
Ignition control modules were introduced along with fuel injection. Electronic fuel injection requires a computer coupled with a host of sensors for situational input from the engine to operational strategies compiled within the computer. These strategies are formulated to optimize the engine’s performance under all density altitude conditions as to the mass of the air and for real-time power demand. Its strategies also include the proper operation to minimize harmful emissions into the atmosphere. It does this by not only maintaining a 14.5-to-1 optimal mixture ratio for power, but by monitoring the amount of unburned fuel and adjusting the on time of the injectors and the spark advance. The oxygen sensors are the primary sensors indicating the emission level through the amount of free oxygen in the exhaust system. When they encounter free oxygen in the exhaust system, they give off varying electrical signals in the millivolt range. These electrical signals are called counts. The comp
