【单选题】【消耗次数：1】
汽车高速时提速慢的原因是以下哪个
①
点火线圈损坏
②
ECU有故障
③
个别火花塞间隙不正确或有电极烧蚀情况
④
以上都不是
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【判断题】
ECU连续发出4-5次点大信号后仍未接教到第二组点火线圈的点火监控信号(IGf信号)的原因:No.2点火线同ECU之间的监控信号线路断路或搭铁,点火控制器故障,ECU故障
①
正确
②
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