Beware of misfire

Dangerous interruptions in the operation of the ignition system require a quick reaction of the control and monitoring system. Sometimes the driver won't even notice.

In electronic ignition systems, the control device is able to control the release of electricity. It can also determine if there is a spark at all on the candle. The integration of the ignition system with the injection system allows injection into the cylinder to be interrupted when a misfire is detected. Otherwise, the unburned mixture will enter the catalyst, which can lead to its destruction.

The test for the so-called misfiring is constantly carried out by the OBD II on-board diagnostic system and its European counterpart EOBD. During each trip, the system checks if the number of misfires can damage the catalytic converter and if it is high enough to increase the emission of harmful compounds by 1,5 times. If the first condition is met, the Exhaust Warning Light, otherwise known as MIL or "check engine", will flash. If the second condition is met, at the end of the first drive cycle, an error is stored in the diagnostic memory, but the exhaust lamp indicator does not light. However, if the system detects the same hazard at the end of the second driving cycle, the exhaust gas warning lamp should signal this with a steady light.

The lack of operation of one cylinder in a multi-cylinder engine due to misfiring and injection shutdown may not even be noticed as a decrease in idle speed. All thanks to the speed stabilization system in this range, which, thanks to the ability to adapt to changing control conditions, will be able to maintain the speed at the proper level. However, the individual stages of such adaptation, stored in the memory of the controller, allow the technical staff to accurately identify the malfunction.