1发动机熄火一辆装用北京BJ492Q型发动机的燕京牌小型客车，一次行驶中突然出现化油器回火、消声器放炮的现象，拉阻风门无效，在滑行约80mm后发动机熄火。初时怀疑是燃料系不供油的故障，经检查，油路正常。。随后检查高压总线和分线，火花均强烈，更换火花塞，仍然不能使汽车 1 Engine Stalled A Yanjing brand minibus equipped with a Beijing BJ492Q engine suddenly experienced carburetor tempering and muffler blasting during a trip. The derailleur was ineffective and the engine ran out after a taxi of about 80 mm. Initially suspected fuel system failure, after inspection, the normal oil. . Then check the high-voltage bus and sub-line, sparks are strong, replace the spark plug, still can not make the car