发黑, 没油, 觉得根本没燃烧
回答: 4个plugs都查了?如果其他3个大体一样而#2独特,发黑但不OILiy,应是燃烧不充分,若黑且Oily,OilLeak
由 mountrobson
于 2022-11-04 08:21:18
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