Why does a car sometimes misfire and sometimes run normally?

1 Answers
VanLandon
07/30/25 1:00am
Reasons why a car sometimes misfires and sometimes runs normally: 1. Aging of ignition coils and spark plugs causing the ignition system of the cylinder to fail, which can lead to sudden engine stalling in severe cases; 2. Wear and tear of cylinder wires; 3. Clogged fuel injectors or fuel lines; 4. Excessive carbon buildup on spark plugs. Misfiring refers to the sudden loss of a cylinder during engine operation, resulting in severe shaking during acceleration, lack of power, and abnormal noises. Detection method: Disconnect the power supply wires of the ignition coils of each cylinder one by one. If the shaking worsens, it can be confirmed that this cylinder is not the problem; if there is no reaction from the engine after disconnection, it can basically be determined that this cylinder is the issue.
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