Ram and Jeep used the CP4 pump on vehicles equipped with the 3.0-liter Cummins diesel from 2014 to 2023 with Ram also using it on the 6.7-liter ... Is A CP4 Injection Pump Replacement DIY ...

The CP4 fuel pump can be problematic in the long term which is why you'll want to know if your vehicle has one. Here's how to know if you have one.

While DIY replacement of the CP4 injection pump and associated fuel system components is possible, I wouldn't exactly call it friendly. The most challenging part of working on automobiles I've ...