Bostech Auto Blog

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 …

Table of Contents Introduction: The Modern Cummins Story The 6.7L Cummins Across Three Generations Problem 1: EGR Cooler Failure Problem 2: EGR Valve Clogging and Sticking Problem 3: DPF Clogging and Regeneration Trouble Problem 4: VGT Turbo Vane Sticking and Actuator Failure Problem 5: Grid Heat …

Table of Contents Introduction: The First Duramax and Its Famous Weakness The LB7 Fuel System and How the Injectors Work The Three Original Injector Failure Modes Symptoms of LB7 Injector Failure Diagnostic Trouble Codes on the LB7 Diagnostic Step 1: Reading Balance Rates Diagnostic Step 2: The I …

Table of Contents Introduction: Why the 6.0L Has the Reputation It Does The 6.0L PowerStroke Platform at a Glance Problem 1: Oil Cooler Failure Problem 2: EGR Cooler Failure Problem 3: Head Gasket Failure and Stretched Head Bolts Problem 4: HEUI Injector Stiction and Failure Problem 5: FICM Failu …

Table of Contents Introduction: The Most Expensive Eight Pounds in Diesel What Is the CP4 and How It Works CP4 Application List Across Diesel Platforms The L5P Clarification: HP4 Is Not CP4 Why the CP4 Fails: The ULSD Lubricity Problem The Cascading Failure: From Wear to Total System Loss CP4 Fai …