Vgate VT200 12V Car Injector Tester 1. This tester can help diagnose injector problems, and you can use it to test each injector individually to help identify stuck, leaking, or burnout conditions. 2. It has four pulse modes, the user can choose a suitable mode according to the test needs, and the continuous mode (mode 4) helps to identify the good or bad of the injector. 3. The mode lock function ensures consistency when testing injectors. 4. It can be used with any fuel pressure tester. Gasoline engines only, not for diesel engines. 5. 12V vehicle battery for power, work with any fuel pressure tester. 6. The mode lock feature ensures test condition uniformity, 4 pulse modes, the continuous mode helps good or bad injector