Diesel Repair Blog for Trucks and RVs

Owners of older diesel motorhomes equipped with the Cummins ISL 8.9L engine may be familiar with the term CAPS fuel pump. CAPS stands for Cummins Accumulator Pump System, a fuel injection system used on certain older Cummins diesel engines before the transition to newer common-rail technology. While these engines have powered motorhomes for many years, the CAPS fuel system has several components that can develop problems as the vehicle ages. For an RV owner, those problems ma

Diesel fuel injectors are some of the hardest-working components inside a modern diesel engine. Their job sounds simple: Deliver fuel into the cylinder. But they have to do it with extremely precise timing, pressure, and spray pattern—over and over, thousands of times while the engine is running. When an injector starts to wear or fail, the engine may develop anything from a slightly rough idle to severe smoke, hard starting, loss of power, or fuel contamination in the engine