The instrument has been set up with various parameters at the factory; Including: throttle stepper motor speed, solenoid valve frequency, injector frequency and duty cycle, no tedious adjustment, direct use. W10 excavator tester and EGR-8 tester have complementary functions Its 8-pin interface is engineered to match common electronic valve harnesses, helping mechanics perform accurate functional tests, identify faulty valves and confirm repairs without repeated disassembly. It allows technicians to quickly test, verify and troubleshoot EGR and turbocharger electronic control valves on-site, reducing downtime and improving maintenance efficiency. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need., Weight: 2.20462262 pounds, Manufacturer: Yoeruers