Feb 16, 2021 · CP4 Fuel pump failure at 7200 miles and 6 months into ownership of my 2020 Ram 2500. cobradvm Sep 25, 2020 Prev 1 …

Oct 16, 2020 · After 10 months of ownership and 2 CP4 replacements later, 1 Asymetrical and now Symetrical my CP4 pump rattle is finally gone after they installed the new pump today.

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...

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 …

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 …

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 …

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!

Dec 16, 2015 · The design of the CP4 seems to make the failure worse by allowing the fine metal fragments to contaminate the entire system. Pretty much the whole fuel system needs to be …

Mar 18, 2021 · I have a 2020 Ram 5500 6.7 Cummins with a build date of 8/20 It has the revised cp4 injection pump with the big dimple on the pump. Ever since we got this truck it makes a loud buzzing …

Jul 26, 2024 · After getting the recall done at my local dealership (on my 2019 2500 mega cab bighorn) to swap the cp4 (about 1.5 years ago) I noticed a boost leak sound coming from my left ac vent / …