Here is the ultimate tool for diagnosing a number of problems that affect diesel fuel injector nozzles the nozlrater tester enables you to check for leakage, pop-off pressure, spray pattern, and chatter. this tool will accommodate a wide range of injectors. we also offer adapters so you can troubleshoot nozzles used in popular automotive, agricultural, and construction engines. nozlrater features a rugged, lightweight reservoir that holds 7/10 of a gallon of fuel. it is equipped with a replaceable 2-micron filter. the large, dual-scale, high-pressure gauge is protected by a guard and includes an indicator needle to record maximum pressure reached. the tester is light enough to be easily carried for field use. or you can bench-mount it, using the holes in its base. not designed for cummins or detroit injectors