Without a special tester you cannot check up work of atomizers. You can note only external damages or strong pollution. You will not see deterioration of internal details of an atomizer. By means of a tester it is possible to define pressure of injection, but is better to replace atomizers. If you have disassembled atomizers, do not leave them for long time to lie on a workbench, surfaces of a needle and the atomizer case are processed with a split-hair accuracy and are very sensitive to a dust and a rust touch. Establish new atomizers only with new прокладочными rings. The moment of an inhaling of holders of an atomizer makes 24 Нм.