Essential Tips for Maintaining Your Bosch CP4 Diesel Injection Pump The Bosch CP4 diesel injection pump is a critical component in trucks like the Ford Power Stroke, GM Duramax, and RAM Cummins. That said it does have it's issues. Pump failure is common and can send metal debris through your whole fuel system making it a flaming dumpster fire and a very expensive paper weight. To ensure its longevity and prevent costly repairs, steps should be take to ensure a clean and fresh fuel source to...
