Automotive Fuel Injector Tester, 12V 4 Pulse Modes, Handheld Car Vehicle Fuel Pressure System Diagnostic Scan Testing Tool Gauge, Individual Test Stuck/Leaking/Burnt-out Problem This injector tester with 41.5cm/ 16.3 inches test lead can work with any fuel pressure tester. Please NOTE: Gasoline car only, NOT the diesel engine 4 MODES- Large LED display with 4 pulse modes- Short/ Medium/ Long/ Continuous modes help to identify good or bad injector. DIAGNOSE INJECTOR PROBLEMS- you can use it to test each injector individually to help identifing stuck, leaking or burnt-out conditions. It works with engine off and pulse timer may be used with fuel pressure gauge. MODE LOCK FEATURE The mode lock feature ensures test condition uniformity. RELIABLE- With CE Marking, it complies with all essential health and safety requirements set out in European Directives Mode 1: the tester outputs 1 pulse, whose pulse width is about 250ms Mode 2: the tester outputs 50 pulse, every pulse&#039;s pulse width is about 7ms Mode 3: the tester outputs 100 pulse, every pulse&#039;s pulse width is about 3.5ms Mode 4: the tester outputs pulse continuously at the rate of 50 pulses per about 1450ms, every pulse&#039;s pulse width is about 7ms Turn off the vehicle&#039;s engine Connect pulse output terminal to the fuel injector Connect Black / Red Clip to the Negative / Positive terminal of battery Press the &#034;MODE SET&#034; key to select the desired pulse mode Press  the &#034;PULSE&#034; key, tester will output pulse to the injector, and  then the pulse signal indicator will light as indication Size: 147 x82 x 29mm (for main body only) Item Weight: about 165g Package Weight  : 036kg Package Size: 20cm x 16cm x 7cm (7.87in x 6.30in x 2.76in) Starting issues. Poor idle. Failed emissions. Poor Performance. Engine does not reach full RPM. Increased fuel consumption. Rough engine performance. Increased Fuel Consumption Poor Idle Hard Starting Poor Emissions Oil thinning, which can lead to catastrophic engine failure