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 …

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 …

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...

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 …

Oct 24, 2022 · I just had the CP4 pump replaced and noticed some oil drips in the garage. Looking around the engine bay, it appears to be power steering fluid and coming from the …

Dec 28, 2020 · 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 …

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 …

May 28, 2019 · Should i be adding some fuel additive with lubricity for the cp4.2 pumps? i know there is alot of hype about the past issues with the cp4 and dont want to...

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 …

Aug 29, 2020 · Here is a picture of a Bosch CP4.2 after catastrophic failure. After, without warning, the engine shuts down, the steering wheel locks, and you have no power brakes, …