Is it a misfire if the engine idles roughly but runs fine?
1 Answers
Idling roughly but running fine is not a misfire. If the engine is misfiring, one cylinder will not be working whether at idle or while driving. Most misfires are caused by faults in the ignition system. The ignition system of a car engine mainly consists of ignition coils and spark plugs. Spark plugs are wearable parts that need to be replaced regularly. If spark plugs are used for a long time, the electrode gap will increase, which will affect the spark plug's ignition. Prolonged use can also cause carbon deposits on the electrodes, which will also affect the spark plug's ignition. Although ignition coils are not wearable parts, they can also fail after long-term operation in high-temperature environments.