CP4 Fuel Injection Pump Preventive Maintenance

Original design CP4 fuel injection pump.

There has been a lot of discussion about the 2019-2020 Ram 6.7 CGI Cummins Turbo Diesel trucks that were equipped with the Bosch CP4 fuel injection pump. A few people have “the sky is falling” attitude, while most others are not concerned at all about the new for Cummins pump choice. When we were in Columbus for the Cummins 100th anniversary celebration in 2019, we were told by the engineers that the reason for the change was to reach the higher fuel pressures required for stricter emissions. This sounded reasonable,…