Bostech Auto Blog

Table of Contents Introduction: The Duramax Everyone Wants The LBZ Duramax at a Glance Problem 1: Water Pump Failure Problem 2: Injector Harness Chafing and Misfires Problem 3: Fuel Injector Wear and Balance Rates Problem 4: VGT Turbo Vane Sticking Problem 5: Air in Fuel and Filter Head Problems …

Table of Contents Introduction: Ford Builds Its Own Diesel The 6.7L PowerStroke Across Three Generations Problem 1: CP4 High Pressure Fuel Pump Failure Problem 2: EGR Cooler and EGR Valve Failure Problem 3: Turbocharger Failures by Generation Problem 4: Radiator and Cooling System Leaks Problem 5 …

Table of Contents Introduction: The Short Lived Twin Turbo PowerStroke The 6.4L PowerStroke Platform at a Glance Problem 1: EGR Cooler Failure (Two Coolers, Twice the Trouble) Problem 2: Radiator Leaks and Cooling System Weakness Problem 3: Cracked Turbo Up Pipes Problem 4: High Pressure Fuel Pum …

Table of Contents Introduction: The Bridge Between LB7 and LBZ The LLY Duramax at a Glance Problem 1: Overheating Under Load Problem 2: Restrictive Turbo Inlet Manifold Problem 3: Head Gasket Failure Problem 4: Cooling Stack and Fan Clutch Weakness Problem 5: Water Pump Failure Problem 6: Injecto …

Table of Contents Introduction: The 5.9L Cummins Across Four Generations Generation Overview: 12V VE, 12V P7100, 24V VP44, and Common Rail The Killer Dowel Pin (KDP): 1989 to 2002 P7100 Overflow Valve Failure: 1994 to 1998 VE Pump Seal Deterioration: 1989 to 1993 VP44 Injection Pump Failure: 1998 …

Table of Contents Introduction: The Last Pre Emissions PowerStroke The HEUI System and How It Differs From Other Diesels Problem 1: Camshaft Position Sensor (CPS) Failure Problem 2: Under Valve Cover Harness (UVCH) Faults Problem 3: Injector Driver Module (IDM) Failure Problem 4: ICP Sensor Failu …