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Read Before Installing Your New LB7 Injectors

Perform a fuel system inspection prior to installation of replacement injectors. If rust, contamination or metal particles are found the fuel system must be cleaned including the tank, filter housing, supply lines and the high-pressure system. Failure to completely clean the complete fuel system can result in immediate or repeated short-term injector failures.
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GM 6.6L Duramax LMM Injector Installation Tips.

  1. When working on the fuel system be carefully to prevent injury. The high-pressure side of the fuel system is pressurized up to 26,500 PSI and the injector wiring high voltage is approximately 45 volts. Make sure the engine is off, the high-pressure has bled down, and the engine has cooled off prior to working on the fuel system.
  2. Before performing an injector balance test check that the actual rail pressure and the desired rail pressure match by performing a fuel pressure regulator graphing test. Unstable rail pressure will cause inaccurate injector balance rate results.

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DGV vs DRST 5.9L Style Injectors.

Perform a fuel system inspection prior to installation of replacement injectors. If rust, contamination or metal particles are found the fuel system must be cleaned including the tank, filter housing, supply lines and the high-pressure system. Failure to completely clean the complete fuel system can result in immediate or repeated short-term injector failures.
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