解决办法：检查火花塞是否积碳过多，更换火花塞。

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

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气过浓，燃油消耗过量，以及造成火花塞、活塞环、气门的堵塞(因积碳过量)。

High pressure will cause an over rich mixture, excessive fuel consumption, and such troubles as fouled spark plugs, rings, and valves (from excessive carbon deposits).

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