Feb 10, 2025 · My dealership preformed the recall to change out the High-pressure Fuel Pump CP4 and install the CP3 on my 2019 Ram 2500 6.7 Cummins with 130K on it. This...

Dec 22, 2020 · Symmetrical Bosch CP4.2 injection pump on late 2020 models (HDRams) The 2019 Ram Heavy Duty models debuted with the new 6.7 liter Cummins Turbo Diesel inline-6, the first to …

Dec 19, 2020 · CP4 to CP-ISB21S3 (revised CP3) change for 2021 6.7L Diesel Trucks -- Merged Threads Viper67 Dec 19, 2020 1 …

Jan 4, 2021 · Thanks for your responses. I'll probably keep the CP4 pump up till about the time the basic warranty expires, then I'll purchase a CP4 to CP3 conversion kit to replace it unless Ram or …

Sep 7, 2020 · The LX4 Lubricity Extreme is a CP4 fuel system saver that helps protect vehicles susceptible to a failing CP4 fuel injection pump. Order at Hot Shot's Secret!

May 17, 2023 · I called yesterday for an update at the dealership and was told, yep- it was the CP4 fuel pump and that they had to wait to see what Ram wanted to do. I know they are responsible for the …

Aug 29, 2020 · Hello. I am very new to the RAM forum and have worries about the new Bosch CP4.2 Fuel Pump that is being used on the new High Output Cummins 6.7, in the Ram 3500 Duelly, which I …

Jul 17, 2021 · CP4 to CP3 conversion discussion moved from larger CP3 thread NordicNevs Jul 17, 2021

Mar 24, 2025 · We also know from the Ford 6.7 vs GM LML situation, the CP4 survivability tended to be better with good filtration and lift pumps. Both of those are present, so just like on the Fords, it should …

Dec 9, 2024 · We will see. For all we know, this “CP8” might simply be a cam lobe change and a name change to escape the CP4 hate. I’ve heard many times before that Bosch isn’t the most pleasant to …