If you have a timing gun (or timing light (another name)), clamp its battery probes to the battery posts, clamp the other coil clump (or magnetic clamp) on the spark plug wire, you will see if there is any problem of sparks (time light is lighting up if you ask some one to crank the engine, try all spark plugs). If all plugs have light, it will be the problem of your fuel pump, fuel pump fuse, fuel filter or fuel line. Most likely it is the fuel pump. In old cars, if you turn your key in the first position, not crank the engine yet, you could hear the fuel pump working or pumping fuel, "tsi, tzi"sound in quiet environment.
Old saying, in case you have hard time to start your engine, if the engine is cold, problem is electric; if the engine is hot, it is the fuel problem.
丰田Camry2016年，跑了3万6千英里。一月份刚换的电池。今天想用车， 结果无法启动。见视频。
先是怀疑电瓶出问题，到Costco置换了一个电瓶， 装上后还是无法启动。 两三个星期前遇到过相同问题，不过车子后来启动了。
从视频中可以看到，发动的瞬间，电压从12.4伏特降到11.3伏. 会是什么部件坏了？拜谢大家！
刚启动时电压有瞬间下降，如果alternator正常的话，电压应该马上到14v以上。你这个为什么一直是11.3？
If you have a timing gun (or timing light (another name)), clamp its battery probes to the battery posts, clamp the other coil clump (or magnetic clamp) on the spark plug wire, you will see if there is any problem of sparks (time light is lighting up if you ask some one to crank the engine, try all spark plugs). If all plugs have light, it will be the problem of your fuel pump, fuel pump fuse, fuel filter or fuel line. Most likely it is the fuel pump. In old cars, if you turn your key in the first position, not crank the engine yet, you could hear the fuel pump working or pumping fuel, "tsi, tzi"sound in quiet environment.
Old saying, in case you have hard time to start your engine, if the engine is cold, problem is electric; if the engine is hot, it is the fuel problem.
也许该视频可以提供一些hint.
有不少原因都可能造成这个现象。如果自己不想花时间精力排除故障，送修吧。
～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～
如果愿意自己排查，尽量从相对简单的开始。相信你最了解车的行驶维护历史。可以为分析问题提供一些帮助。
两个简单的例子，比如修过一台丰田车，状况是有时无法启动，一直crank, 试着反复加大油门有时可以勉强启动。与你的视频声音相像。清理maf sensor, throttle body 及 throttle position sensor故障排除。maf 及throttle 须用专用清洗剂。
另一台丰田车的问题现象类似，但要稍微费一点事。也是crank但不点火。原因是与crankshaft position sensor 有关。不是sensor 有问题，而是与其链接的信号线虚接。
燃油汽车启动，车载电脑要根据各个传感器提供的数据，判断是否可以正常点火启动。油，气，电，机械，任何部件有大的偏差都无法正常启动。一般从简到繁排查。
建议买个obd2 scanner吧，很便宜，十几块钱的带live data的。即便自己不修，至少可以了解车载电脑发现的问题。不然遇到引擎灯亮了的类似的问题，要花不少时间到外面读码，时间上的话费更多。而且还可以读IM信息，告诉你车检与发动机及排气系统是否能过关。
上面各位也给出各自的不错的建议。不过还是要看你自己的想法，送修或自己排查。
Good luck.
是肯定有差距的。比如，前面油网友建议查immobolizer, 油管看了半天，还晕乎。你建议的这些相对来说对我就容易一些。因为类似的干过。