Spark plugs have an impact on fuel consumption. Spark plugs are key components for igniting the engine and igniting the oil-gas mixture in the cylinder. They are like the "pacemaker" of the engine's heart. Their condition directly affects the engine's operation, and thus affects fuel consumption.
The spark plug electrode gap has a significant impact on fuel consumption. If the gap is too small, the spark is weak and it is easy to leak electricity due to carbon deposits; if the gap is too large, the breakdown voltage increases, the engine is not easy to start, and it is easy to "lack fire" at high speed. After the engine is started, the spark plug continues to work in a high temperature environment. Long-term ablation and carbon deposition will expand the electrode gap, reduce the ignition intensity, and lead to increased fuel consumption. For example, for a car with a 4-cylinder engine, if the spark plug on one cylinder is in poor condition or does not work, fuel consumption will increase by more than 30%.
Carbon deposits on the spark plug or long use time will affect the ignition performance, resulting in incomplete fuel combustion, increased fuel consumption, and may also be accompanied by problems such as weak acceleration and exhaust emission pollution. Replacing the spark plug in time can solve this problem.
The calorific value of the spark plug is also related to fuel consumption. If the heat generation is too large, the heat dissipation is fast, the spark plug temperature is low, and the carbon and fuel consumption are easy to deteriorate. The ignition intensity also affects the fuel consumption. The reduction of ignition intensity will cause the fuel consumption to increase. Therefore, when replacing the spark plug, pay attention to factors such as gap, calorific value and ignition intensity in order to improve power and save fuel.
Usually, ordinary spark plugs need to be replaced after 20,000 to 30,000 kilometers. During maintenance, if the gap between the spark plug electrodes is found to be too large, it should be replaced in time.
In addition, although the spark plug has an impact on fuel consumption, the impact is not particularly significant. In addition to the spark plug, the weight of the car, incorrect driving habits, carbon deposits in the gearbox, stains or sludge on the engine surface, low tire pressure, as well as the displacement, appearance, wind resistance, external environment, etc. of the car will have an impact on fuel consumption.
