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2026-11-01 · 3 min read

Spark Plugs — When to Change Them and What Happens If You Don't

Worn spark plugs cause rough idling, poor fuel economy and hard starting — but most drivers never think about them. Here's when to replace them, the types available, and signs they're already causing problems.

Spark Plugs — When to Change Them and What Happens If You Don't

火花塞是引擎点火的关键零件——每一次爆炸(每分钟数千次)都需要它产生火花。它慢慢磨损,症状也慢慢出现,所以很多人没有意识到。

更换间隔

**普通铜质火花塞**:每 **20,000–30,000 km** 更换,价格低廉。

**铂金火花塞(Platinum)**:每 **60,000–80,000 km** 更换,寿命是铜塞的 2–3 倍。

**铱金火花塞(Iridium)**:每 **80,000–120,000 km** 更换,寿命最长,性能最稳定,价格最高。

现代车大多出厂配备铂金或铱金塞,一套可以用很多年,但不代表「永远不需要换」。

该换了的信号

**怠速抖动**:引擎在停车等红绿灯时有明显抖动,代表某个气缸点火不稳定。

**加速无力、引擎缺乏响应**:点火效率下降导致功率损失。

**油耗突然变差**:点火不完全,更多燃油没有被充分燃烧就排出。

**启动困难**:特别是冷车启动需要多拧几次。

**Check Engine 灯亮**:OBD 读出失火(Misfire)故障码,可能是火花塞问题。

一次换几条?

建议**一次换全套**(所有气缸)。火花塞是同时安装的,磨损程度接近,换一条其他几条也快到期了。

一次只换一条,几千公里后其他条又需要换,反复拆装反而浪费。

马来西亚的注意事项

马来西亚湿热气候,机油蒸汽和燃烧残留物积累更快,火花塞电极积碳情况比温带国家更明显。

高里程车(超过 10 万 km)应该在保养时顺便检查火花塞状态。

4M CARCARE 可以在引擎保养时顺便检查火花塞状态,不需要单独预约。

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