Is CP4 still a problem?
Banned
Joined: Dec 2018
Posts: 3,541
Likes: 458
The 20k mile failures seemed to be more with the older Duramaxes and 2019-20 Cummins motors. RAM and Cummins recalled all of them late last year and put CP3's back in them, not wanting it to further sully their reputation with their diesel customers and good for them for doing that. Unfortunately Ford can't do that because no other pump fits in that spot, so according to them nothing is wrong. That's their story and they're sticking to it. If the pump fails and ruins the whole fuel system, it was your fault for buying their truck and not putting pharmaceutical grade diesel fuel in it as far as they are concerned.
Lead Driver
Joined: May 2021
Posts: 5,818
Likes: 3,453
From: Uh oh, CA
Maybe I should have said it a little different… other than “great.” I don’t know how though. As I understand it, the quality of the fuel is likely the most common cause of failure on these. Next to that, maybe negligence. I dunno. I know my aunt had a 17 KR and the pump went out and took the entire motor down. However she didn’t understand anything about the truck and shouldn’t have had it because she never even changed the filters and it took a dump in less than 30k miles. Ford denied the warranty and she ended up getting her insurance to cover the replacement. I don’t know all the details but I know that she didn’t keep maintenance up on it, and likely just pulled into just any station that had diesel.
I understand that doing everything right is no guarantee, but that’s true of any and everything… especially now a days. I just spent almost an hour driving around Gatlinburg and Pigeon Forge trying to find a station that looked decent and busy… I finally settled on a Shell, but who knows what the quality of fuel actually is…
And yes, it would be awesome if Ford would start including and OEM DPK.
I understand that doing everything right is no guarantee, but that’s true of any and everything… especially now a days. I just spent almost an hour driving around Gatlinburg and Pigeon Forge trying to find a station that looked decent and busy… I finally settled on a Shell, but who knows what the quality of fuel actually is…
And yes, it would be awesome if Ford would start including and OEM DPK.
Hotshot
Joined: Oct 2006
Posts: 10,146
Likes: 7,971
From: Texas
Maybe I should have said it a little different… other than “great.” I don’t know how though. As I understand it, the quality of the fuel is likely the most common cause of failure on these. Next to that, maybe negligence. I dunno. I know my aunt had a 17 KR and the pump went out and took the entire motor down. However she didn’t understand anything about the truck and shouldn’t have had it because she never even changed the filters and it took a dump in less than 30k miles. Ford denied the warranty and she ended up getting her insurance to cover the replacement. I don’t know all the details but I know that she didn’t keep maintenance up on it, and likely just pulled into just any station that had diesel.
I understand that doing everything right is no guarantee, but that’s true of any and everything… especially now a days. I just spent almost an hour driving around Gatlinburg and Pigeon Forge trying to find a station that looked decent and busy… I finally settled on a Shell, but who knows what the quality of fuel actually is…
And yes, it would be awesome if Ford would start including and OEM DPK.
I understand that doing everything right is no guarantee, but that’s true of any and everything… especially now a days. I just spent almost an hour driving around Gatlinburg and Pigeon Forge trying to find a station that looked decent and busy… I finally settled on a Shell, but who knows what the quality of fuel actually is…
And yes, it would be awesome if Ford would start including and OEM DPK.
And just FYI, I was one that had issues with my ‘15. the problems started at less than 500 miles on the odometer. I fought the damn thing for a year. Had it to four different dealers, I finally hauled it back to the dealer where I bought it on my own dime and dropped it in front of the shop door before opening time.
IMHO, the CP4 is the furthest thing from being a “great” pump.
Lead Driver
Joined: Feb 2005
Posts: 7,923
Likes: 2,642
From: The Great State of Texas
I remember years ago the NHTSA reported something like 0.01%. What we didn't know was how many were because of operator error (ie DEF, gasoline in fuel tank), water, infant mortality, mileage, etc...
Cargo Master
Joined: May 2018
Posts: 2,442
Likes: 993
Maybe I should have said it a little different… other than “great.” I don’t know how though. As I understand it, the quality of the fuel is likely the most common cause of failure on these. Next to that, maybe negligence. I dunno. I know my aunt had a 17 KR and the pump went out and took the entire motor down. However she didn’t understand anything about the truck and shouldn’t have had it because she never even changed the filters and it took a dump in less than 30k miles. Ford denied the warranty and she ended up getting her insurance to cover the replacement. I don’t know all the details but I know that she didn’t keep maintenance up on it, and likely just pulled into just any station that had diesel.
I understand that doing everything right is no guarantee, but that’s true of any and everything… especially now a days. I just spent almost an hour driving around Gatlinburg and Pigeon Forge trying to find a station that looked decent and busy… I finally settled on a Shell, but who knows what the quality of fuel actually is…
And yes, it would be awesome if Ford would start including and OEM DPK.
I understand that doing everything right is no guarantee, but that’s true of any and everything… especially now a days. I just spent almost an hour driving around Gatlinburg and Pigeon Forge trying to find a station that looked decent and busy… I finally settled on a Shell, but who knows what the quality of fuel actually is…
And yes, it would be awesome if Ford would start including and OEM DPK.
Lead Driver
Joined: Feb 2022
Posts: 7,958
Likes: 4,039
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Banned
Joined: Dec 2018
Posts: 3,541
Likes: 458
That would be them admitting to a bad design, and if they did that somebody would like sue, then they are open to having to retrofit every 6.7 PSD. They won’t change anything until they do a complete re-design of the block where the pump mounts so that nothing will interchange.
And just FYI, I was one that had issues with my ‘15. the problems started at less than 500 miles on the odometer. I fought the damn thing for a year. Had it to four different dealers, I finally hauled it back to the dealer where I bought it on my own dime and dropped it in front of the shop door before opening time.
IMHO, the CP4 is the furthest thing from being a “great” pump.
And just FYI, I was one that had issues with my ‘15. the problems started at less than 500 miles on the odometer. I fought the damn thing for a year. Had it to four different dealers, I finally hauled it back to the dealer where I bought it on my own dime and dropped it in front of the shop door before opening time.
IMHO, the CP4 is the furthest thing from being a “great” pump.
Cargo Master
Joined: May 2018
Posts: 2,442
Likes: 993
Ford could quietly change the screen on the fuel metering valve and that would help with contamination.
https://powerstrokecustoms.com/product/exergy-system-saver-improved-metering-valve-6-7-powerstroke-2011-2019/
This is the ultimate solution though.
https://powerstrokecustoms.com/product/exergy-system-saver-improved-metering-valve-6-7-powerstroke-2011-2019/
This is the ultimate solution though.
Thread Starter
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Tuned
Joined: May 2020
Posts: 336
Likes: 56
From: Rio Grande Valley, NM
Useful input so far. I eventually found this thread:
https://www.ford-trucks.com/forums/1...cp4-issue.html
which provides more info and opinions
https://www.ford-trucks.com/forums/1...cp4-issue.html
which provides more info and opinions
This has, however, nudged me towards a decision on the next truck.
I now have, in the driveway, a 2023 Chevy Silverado 2500 HD, Crew Cab, SRW, Duramax Diesel. Shopping for the fifth wheel hitch it needs.
Thread Starter
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Tuned
Joined: May 2020
Posts: 336
Likes: 56
From: Rio Grande Valley, NM
Me again, sorry got the "hornet's nest" thread wrong. here it is
https://www.ford-trucks.com/forums/1...-the-past.html
I can not take any credit for poking that one. Still, really interesting.
https://www.ford-trucks.com/forums/1...-the-past.html
I can not take any credit for poking that one. Still, really interesting.
Thread Starter
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Tuned
Joined: May 2020
Posts: 336
Likes: 56
From: Rio Grande Valley, NM
Agreed, my pre-purchase investigation turned up only little stuff. Like a plugged tube on the MAP sensor. Even that was uncommon.
Lead Driver
Joined: Feb 2005
Posts: 7,923
Likes: 2,642
From: The Great State of Texas
Enjoy...
