求翻译：检查过程：该车为上线新客车，据反映，此车下线后起动了一会儿，熄火后再也无法起动。经检查相关电路均符合条件，拔出喷油器做外接试验，起动发动机观察喷油情况，喷油器均不喷油；检查油泵发现油泵回油处回油量过大，判断是轨压无法建立，更换油泵总成后，发动机顺利起动。是什么意思？

The inspection process: on-line new passenger car, it is reflected in this car off the assembly line for a while after the start, turn off and then can not start. Are qualified by the check circuit, pull out the injector external test, start the engine to observe injector situation, not fuel injecti