Symptoms of Engine Misfire?

[KathrynAnn]

Automobile engine misfire manifests as: 1. Unstable idling and abnormal engine vibration; 2. Significant power reduction; 3. Difficulty starting the vehicle and engine prone to stalling; 4. Black smoke emitted from the exhaust pipe. The primary causes of engine misfire stem from the ignition system and fuel injection system. Severe burning of the contacts in the distributor cap of the ignition system can cause spark jumping, mostly occurring between corresponding terminals on the cap, leading to erratic idling and severe power loss. Faulty ignition coils can also result in misfire, often causing severe burning of the distributor cap. Issues with the ignition coil most commonly lead to sudden severe power loss and engine stalling.