Recent content by Pjc87

My cp4 is still rattling away, they did a scan report and handed it to me and according to their scan report it’s calibrated correctly. So I guess it’s just a noisy pump. Still nervous it’s gonna explode any minute with how much noise it makes.

We bought two 2020 ram 5500’s. One has a build date of 8/20 And the other has a build date of 9/20 The truck with the build date of 9/20 has the same dimple cp4 pump and it does not have this annoying rattle that the 8/20 truck has. It sure sounds like it’s coming from the injection pump too...

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 noise that cuts in and out and it’s super annoying. I read the tsb pointing out the 2 different pumps one is...