一辆CA10B型大客车,停放了3个月,当猛踏油门再启动时,出现化油器回火并伴有排气管放炮声。开始认为是点火时刻不准或混合气过稀,但经反复调整点火正时及混合气浓度,故障依然存在。在拧下一火花塞检查时,发现汽缸中有进水迹象,估计汽 A CA10B coaches parked for 3 months, when the fierce throttle back to start, there carburetor tempering and accompanied by exhaust pipe blasting sound. Began to think that the ignition timing is not allowed or the mixture is too thin, but after repeated adjustments to the ignition timing and the concentration of the mixture, the fault persists. In the unscrewed a spark plug inspection, found signs of water in the cylinder, the estimated steam