14mm Diesel Common Rail Fuel Injector Block-Off Tool Cap M14 for 2003-2007 Dodge Cummins 5.9L; 2001-2005 Chevy GMC 6.6L Duramax LB7 LLY Engine, 2PCS

Product Description

This diesel fuel injector cap block off tool is a "must have" tool for everyone working on common rail fuel systems. When the pressure of the common rail is too low to start the engine, one of the possible reasons is a defective diesel fuel injector returning excess fuel back to the tank. To identify the individual defective cylinder, you can remove the diesel fuel injection line from the cylinder, and use this diesel fuel injector block off tool instead of diesel fuel injection line to seal common rail pipe. If the engine can be started normally, and the common rail pressure return to normal value, it's to say that the injector of this cylinder is malfunction. And more, if your scanner cannot perform certain tests, this diesel injector block off tool can also be used for diagnosing engine knocking sounds that could possibly be caused by a single cylinder issue. Package Quantity: 2

• Compatible with 2001-2005 Chevrolet GMC Duramax 6.6L LB7 LLY Engine and 2003-2007 Dodge Cummins 5.9L Engine Rail Fuel System, also fits Bosch Common Rail System or Other Vehicles with a 14mm Rail Line Nut • Full Carbon Steel Construction, Surface Antirust • 14mm x1.5 internal thread nuts/ M14 Injector Tester Cap • Replaces Part Number: Miller 9011 / GM EN-47589-1 • Includes 2x Injector Block-Off Caps