Guides
Straight, practical explanations for people who run and maintain heavy diesel equipment, especially fleets dealing with tough fuel and emissions problems.
Why DPFs fail on high-sulfur diesel
How sulfur poisons the catalyst that regenerates your filter, the warning signs, and what fleets on dirty fuel can do about it.
SCR fault codes and derates explained
Why SCR faults cut engine power, the common causes from DEF quality to sensors, and what to check before a machine goes down.