kweiny Diesel Common Rail 18mm Fuel Injector Cap Block Off Tool

Working principle:
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 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 prove that the injector of this cylinder is malfunction.
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.
In some situations, You may need several block off tools to test several injectors at the same time.

Compatibility:
Fit with 2006-2011 6.6L Chevy GMC Duramax (LBZ & LMM) and for Dodge/Cummins 2007-2017 6.7L, Renault engine system, and other vehicles with a 18mm fuel line nut;

Package include: 1 x Block Off Tool

Specification: M18 x 1.5mm

Material:Carbon tool steel, surface antirust.