Fuel Systems
More diesels die from fuel system failures than almost anything else. A CP4 pump grenading sends metal through the entire system. Water in fuel wipes out injectors. These guides explain how the system works, what kills it, and how to protect it.
Fuel Water Separator: The Little Drain Valve Nobody Touches
Water in diesel ruins injectors and pumps. Learn how your fuel water separator traps it, how to drain it in 5 minutes, and why a monthly drain saves thousands.
CP4 vs CP3: Which Pump Your Truck Has and Why It Matters
CP4 vs CP3: find out which fuel pump your Duramax, Powerstroke, or Cummins has, test it with a scan tool, and weigh conversion cost against a failure repair.
Lift Pump Upgrade: When to Buy One, When to Skip It
Thinking about a lift pump upgrade? Kit cost, shop install time, and the injector bill you are dodging. Fleet owner Dave Ryder runs the real numbers for you.
Diesel Fuel Gelling: How It Happens and How to Beat It
Diesel fuel gelling strands trucks every winter. What temperature it gels at, how to prevent it with winter blend and anti gel, and how to ungel your truck.