Common rail pump nozzle ‘s work is good or bad, for each engine's power plays a fundamental role to play. Due to poor fuel injectors work led to ineffective, so that the cylinder coke serious; cylinder, piston rings accelerated wear, resulting in unstable idle, increased fuel consumption, acceleration weakness, starting difficulties and excessive emissions, will be completely clogged spray serious glib, damage the engine. Therefore, regular cleaning fuel injectors, no long-term or frequent cleaning nozzle cleaning will cause bad influence.