LB7 Injectors: Symptoms, Balance Rates, Return Tests & Reliable Replacements The 2001–2004.5 LB7 Duramax is proven, quiet, and efficient—but its early common-rail injectors are notorious for internal wear and leaks. This guide shows you how to confirm a bad injector without guesswork, how to test balance rates and return flow...

DCR Pump Deep Dive: Denso Common-Rail on the 6.7 PowerStroke The DCR pump (Denso Common-Rail high-pressure pump) used on later 6.7L PowerStroke platforms changes how owners think about fuel system reliability. This long-form guide explains how the DCR pump works, how it differs from CP4/CP3, the role of filtration and...

6.0 Power Stroke Injectors: Stiction, FICM Health & Fuel/Oil Best Practices The 6.0L Power Stroke uses HEUI injectors that depend on clean fuel, correct fuel pressure, and high-pressure engine oil to fire. When any of those pillars wobble—varnished oil (“stiction”), weak FICM voltage, air/fuel supply issues—you get hot-soak misfires, long...