2020+ CP4.2 Retrofit

dcbryan13 · Nov 6, 2022

I own a 2012 F250 with the 6.7L. It has 175000 miles on the original CP4.2 with zero issues. Id like to proactively replace/upgrade the CP4.2 here in the next 10,000-15,000 miles to something that flows a little more fuel. I'm aware that the common upgrade is to use a 15-19 model CP4.2 as they flow approximately 9% more fuel than the 11-14 model pumps. As I began doing some research it occurred to me that no one seems to be using (or at least posting about using) the 2020+ CP4.2 pump as an upgrade. From what I understand the 2020+ pumps are exteriorly identical to the 11-19 CP4.2. Ford claims the 2020+ pumps flow similarly to a 15-19 pump just at a maximum possible 36,000 PSI as opposed to the 15-19 pumps being capable of reaching 29,000-30,000 PSI. This along with Ford's advertised increase in power in a 2020 vs a 2019 leads me to believe the 2020+ CP4.2 may be a worth while upgrade. Am I missing something? Anyone have any experience using the 2020+ pumps as a retrofit? I've searched multiple forums, posted in several Facebook groups, and consulted with Ford Master Techs, asking them all this question with no good answers as of yet. Any help or insight would be greatly appreciated.

DieselJpower · Nov 7, 2022

The feed and return on top of the pump is opposite from 11-19. Also I remember reading that in fords testing the 36k psi was detrimental on the aluminum pistons. Increased rail pressure really is a game changer though

superpsd · Nov 20, 2022

It’s too bad there is no way to install a CP3 and get rid of the CP4.2 GM and Ram both have steered away from the CP4. As said above the 2020 plus has steel pistons and different injectors… what is wrong with the aftermarket CP4 options for the 11-19

co04cobra · Nov 20, 2022

I really don’t see enough gain to go away from the cp4.2. Plenty of failures with cp3s as well. It’s honestly part of any and every common rail life.

superpsd · Nov 20, 2022

co04cobra said:
I really don’t see enough gain to go away from the cp4.2. Plenty of failures with cp3s as well. It’s honestly part of any and every common rail life.

Yes but there seems to be a significant lower rate of failure with the CP3 and it seems to be why RAM recalled the 2020-2021 trucks and had the CP4 swapped out for CP3 and they are still using the CP3. And then you had GM with massive CP4 failures and then they ditched Bosch for Denso and their HP4 and after searching HPFP failures on the 2017 up GM trucks seems to be non existent. That being said I still ordered a 2023 which still has the CP4.2