EM276 Car Fuel Injector Tester 4 Pluse Mode Fuel System Scanning Diagnostic Tool Features 1. This tester can diagnose injector problems, you can use it on each injector individually to test stuck, leaking or burnt-out. 2. It used 12V vehicle battery as power supply. 3. It has 4 pulse modes and in the continuous working mode ( mode 4 ), it can help you identify the injector good or not when you switch off the engine. 4. The lock mode can ensure the testing condition is same. 5. It can work with any fuel pressure tester together. Operation instructions 1. Turn off the engine 2. Connect Black Red Clip to the Negative Positive terminal of battery 3. Connect pulse output terminal to the fuel injector 4. Press the MODE SET key to select the desired pulse mode 5. Press the PULSE key, the tester will output pulse to the injector, and then the pulse signal indicator will light as indication. 4 Mode Mode 1: the tester outputs 1 pulse, whose pulse width is about 250ms Mode 2: the tester outputs 50 pulse, every pulse the of pulse width is about 7ms Mode 3: the tester outputs 100 pulse, every pulse the of pulse width is about 3.5ms Mode 4: the tester outputs pulse continuously at the rate of 50 pulses per about 1450ms, every pulse the of pulse width is about 7ms Specification 1. Power Supply: 12V vehicle battery 2. Operation Environment: 0 C - 40C, relative humidity less than 80% 3. Storage Environment: -10 C - 50C, relative humidity less than 85% 4. Size: 147x82x29mm 5. Weight: about 165g