many possibilities:

来源: 毅然 于 2011-11-25 05:48:24 [] [旧帖] [给我悄悄话] 阅读数 : (132 bytes)
回答: 诚心请教!!! 由 puma_bill 于 2011-11-24 18:55:49

worn spartk plugs, plug wires, low battery, aged gas filter, dirty air filter, ... do tune up yourself (plug, wire, filters).

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