An injection pressure tester is an automotive diagnostic tool used to measure and evaluate fuel pressure in an engine’s injection system. It helps determine whether the fuel pump, injectors, pressure regulator, and fuel lines are functioning correctly. The tester typically consists of a pressure gauge, hoses, valves, and adapters compatible with petrol or diesel fuel systems. By connecting to the fuel rail or injection line, it provides accurate pressure readings under different engine operating conditions. This allows technicians to detect issues such as low fuel pressure, clogged injectors, leaks, or pump failure. It is widely used in automotive workshops and service centers to ensure proper fuel delivery, improve engine performance, and support efficient fault diagnosis in fuel injection systems.