Monthly Archives: September 2025

CP4 high-pressure fuel pump on a workbench, illustrating the internal components that commonly fail from poor lubrication and fuel quality.

Why CP4 Fuel Pumps Fail (and how to prevent it)

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Posted in Troubleshooting & Diagnostics

Why CP4 Fuel Pumps Fail in Modern Diesel Trucks

The CP4 high-pressure fuel pump has become one of the most feared failures in modern diesel engines. When a CP4 pump fails, it can send metal particles through the entire high-pressure fuel system, damaging the injectors, rails, pump, and lines. Repairs often climb into five-figure territory, making CP4 failure a nightmare scenario for diesel owners.

The good news? Most CP4 failures are preventable with proper maintenance and fuel-lubricity management.

The Real Reason CP4 Pumps Fail

CP4 pumps can fail for a few reasons — air in the fuel, water contamination, or internal wear — but the #1 cause is:

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Ford F-350 Power Stroke towing a fifth-wheel camper with the text ‘Ford Power Stroke Engine Updates by Year (1994–Present)’ overlaid.

Ford Power Stroke Engine Updates by Year (1994–Present)

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Posted in Engine Platforms (Cummins, Duramax, Power Stroke)

The Ford Power Stroke diesel family has powered Ford’s heavy-duty pickups and commercial trucks for more than 30 years. Across multiple generations, Power Stroke engines have delivered huge gains in horsepower, torque, emissions technology, and reliability.

From the legendary 7.3L to the modern 6.7L “Scorpion,” here is the full year-by-year evolution of the Power Stroke platform.

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Close-up of a 6.7L Cummins Turbo Diesel engine with a mechanic’s gloved hand holding a wrench during inspection.

6.7L Cummins Engine Updates by Year (2009–2025)

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Posted in Engine Platforms (Cummins, Duramax, Power Stroke)

The 6.7L Cummins Turbodiesel has been the backbone of Ram heavy-duty trucks for well over a decade. As competition between diesel manufacturers intensified, Cummins introduced a steady stream of upgrades—boosting power, refining emissions systems, and strengthening internal components to handle ever-increasing torque.

Below is the complete model-year breakdown from 2009 through 2025, including horsepower, torque, emissions changes, and major mechanical upgrades.

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White Ram 2500 hauling a large trailer down a highway with overlaid text reading ‘DEF Requirement Changes for U.S. Diesels’ and ‘2027 Update Explained’.

DEF Requirement Changes for U.S. Diesels (2027 Update Explained)

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Posted in Emissions & DEF Systems

The EPA has officially eased several DEF-related requirements for U.S. diesel vehicles and equipment — and for diesel operators across the country, this is a long-awaited change. The update not only removes some of the most disruptive rules ever applied to diesel engines, but it also signals that federal regulators may be shifting toward more practical, diesel-friendly policies moving forward.

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