What effect do worn spark plugs have on engine performance?

Worn spark plugs significantly impact engine performance by leading to reduced power and efficiency. When spark plugs are worn, they can fail to create a strong enough spark for optimal combustion. This can cause misfires, poor acceleration, and increased fuel consumption, as the engine struggles to burn the fuel-air mixture effectively. Consequently, the overall engine performance suffers, resulting in a noticeable drop in power output and efficiency.

Improper combustion not only hampers engine function but can also contribute to rough idling and difficulty starting the engine. Regular maintenance and timely replacement of spark plugs help ensure that the engine runs smoothly, maintains its power characteristics, and operates efficiently.