2Pcs 12Mm Diesel Common Rail Fuel Injector Cap Block Off Tool For Powerstroke

ApplicationSuit for Ford for Powerstroke 6.4L engines 2008 2009 2010, it can also apply on other vehicles which with 12mm fuel line nut.FunctionUse to block the fuel supply of the detected cylinder, to sealing diesel common rail pipe, let the detected cylinder temporarily stop working. So as to check the faulty diesel fuel injectors and engine cylinder.Feature: Well suit to use with original diesel common rail fuel injector line. Adopt with reliable metal material with galvanized surface, not easy break or deform, hard resistant, prolong service life. An convenient tool for people who works on common rail fuel systems. Please allow 3-5mm differences due to manual measurement. Specification: Color: Brassy Material: Metal Inner Diameter: 12mm / 0.47"(D) Thread: M12x1.5 Include 2x Fuel Injector Cap Block Off Tool Working Principle When the pressure of the common rail is too low to start the engine, If one defective diesel fuel injector returning excess fuel back to the tank, it may result the pressure of the common rail getting low to start the engine. To check the individual defective cylinder, you need to remove the diesel fuel injection line from the cylinder, use the fuel injector block off tool to seal common rail piple, more convenient compare to diesel fuel injection line. If the common rail pressure return to normal and the engine start successfully, then shows the problem is the injector of this cylinder. This tool can also judge engine knocking sounds that may caused by a single cylinder issue.