Solution: check the spark plug is too much carbon, replace the spark plug.

解决办法：检查火花塞是否积碳过多，更换火花塞。

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Check your spark plug for carbon and check the spark plug gap.

检查您的火星塞积碳和检查火星塞白金间隙。

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Check your spark plug for carbon and check the spark plug gap.

检查您的火星塞积碳和检查火星塞白金间隙。

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