Cp4 pump replacement only
FTE Legend
Joined: Mar 2017
Posts: 31,976
Likes: 9,199
From: Western NY
When I watched the SEMA video of the DCR they mentioned that the prevention kit wasn't needed but if installed wouldn't hurt anything. The DCR won't eat the whole fuel system if an issue arises. 
Really has me thinking about it but I don't want to do it myself. Doing it in the open air of the desert at one of my boondocking location isn't a good senerio if something breaks. Civilization can be 30+ miles away.
2016 truck only has 63k miles and I keep them forever and being in the west not seeing snow, not being near the coasts getting salty air the under carriage is like new conditions. Like Overkill2 I'm originally from western NY and don't not miss my trucks rusting away between year 4-8.
Edit...did you mean this video @Overkill2 ?
https://youtu.be/HHC4hM-w-Hk?si=TC0i_y8PfGOOxKak
Really has me thinking about it but I don't want to do it myself. Doing it in the open air of the desert at one of my boondocking location isn't a good senerio if something breaks. Civilization can be 30+ miles away.
2016 truck only has 63k miles and I keep them forever and being in the west not seeing snow, not being near the coasts getting salty air the under carriage is like new conditions. Like Overkill2 I'm originally from western NY and don't not miss my trucks rusting away between year 4-8.
Edit...did you mean this video @Overkill2 ?
https://youtu.be/HHC4hM-w-Hk?si=TC0i_y8PfGOOxKak
Lead Driver
Joined: Jan 2002
Posts: 8,696
Likes: 4,816
From: Itinerant
Watch the video I just posted... they just eat up it up and keep going... but now that I have one, A Gen 2 DPK, maybe I'd keep it on if or when my CP4 went (just more filtration is all)... because I would swap in a DCR pump no doubt.
Too bad you weren't closer Rat, I'd give a fellow WNYer a hand... you talking the DPK or the DCR, to install?
My truck is 7 years old and is not a rust bucket. I get it oiled every year. I'm going to do a thread at one point with the pics I've taken on how I've dealt with the rust, what I've done and what I still have to or rather want to (MonstaLiner on the body along the lines for example)...
Too bad you weren't closer Rat, I'd give a fellow WNYer a hand... you talking the DPK or the DCR, to install?
My truck is 7 years old and is not a rust bucket. I get it oiled every year. I'm going to do a thread at one point with the pics I've taken on how I've dealt with the rust, what I've done and what I still have to or rather want to (MonstaLiner on the body along the lines for example)...
FTE Legend
Joined: Mar 2017
Posts: 31,976
Likes: 9,199
From: Western NY
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,258
Likes: 771
From: Houston, Texas
For me, the DPK is a bandaid to the original problem: The pump itself.
The CPX would be my choice as it bolts right into the current setup with no modifications. All you have to do is time it, slap it in, prime, and go.
The DCR while an awesome pump, requires some modification and costs twice as much and the CPX.
In working on Powerstroke's most of my life, do it once, do it right. Replace the whole fuel system and spend the money so it doesn't happen again. Whether you go with the DCR or the CPX, you're resolving the root cause of the problem rather than band-aiding it.
The CPX would be my choice as it bolts right into the current setup with no modifications. All you have to do is time it, slap it in, prime, and go.
The DCR while an awesome pump, requires some modification and costs twice as much and the CPX.
In working on Powerstroke's most of my life, do it once, do it right. Replace the whole fuel system and spend the money so it doesn't happen again. Whether you go with the DCR or the CPX, you're resolving the root cause of the problem rather than band-aiding it.
Mountain Pass
Joined: Nov 2018
Posts: 249
Likes: 21
Lots of great info here for sure. I’m not finished watching all of the videos but I keep seeing and hearing contaminated fuel being the main cause of the cp4 failure. It’s sad the stock filters don’t do a better job. Now I see why guys are going Fass or Airdog for even more filtration.
Mountain Pass
Joined: Nov 2018
Posts: 249
Likes: 21
For me, the DPK is a bandaid to the original problem: The pump itself.
The CPX would be my choice as it bolts right into the current setup with no modifications. All you have to do is time it, slap it in, prime, and go.
The DCR while an awesome pump, requires some modification and costs twice as much and the CPX.
In working on Powerstroke's most of my life, do it once, do it right. Replace the whole fuel system and spend the money so it doesn't happen again. Whether you go with the DCR or the CPX, you're resolving the root cause of the problem rather than band-aiding it.
The CPX would be my choice as it bolts right into the current setup with no modifications. All you have to do is time it, slap it in, prime, and go.
The DCR while an awesome pump, requires some modification and costs twice as much and the CPX.
In working on Powerstroke's most of my life, do it once, do it right. Replace the whole fuel system and spend the money so it doesn't happen again. Whether you go with the DCR or the CPX, you're resolving the root cause of the problem rather than band-aiding it.
Mountain Pass
Joined: Nov 2018
Posts: 249
Likes: 21
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Mountain Pass
Joined: Nov 2018
Posts: 249
Likes: 21
Cp4 replacement cost regardless of brand. What’s a reasonable rate to do it? Trying to figure up the cost to pay someone to do it vs tackling it myself. Disclaimer: I have not watched all the videos yet. Been crazy busy but I will soon.
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,258
Likes: 771
From: Houston, Texas
Originally Posted by eddienelson
Cp4 replacement cost regardless of brand. What’s a reasonable rate to do it? Trying to figure up the cost to pay someone to do it vs tackling it myself. Disclaimer: I have not watched all the videos yet. Been crazy busy but I will soon.
Most shops will charge around $10-15K depending on their labor rate and their parts markup. Average price being around $12-13.5K.
FTE Legend
Joined: Mar 2017
Posts: 31,976
Likes: 9,199
From: Western NY
For me, the DPK is a bandaid to the original problem: The pump itself.
The CPX would be my choice as it bolts right into the current setup with no modifications. All you have to do is time it, slap it in, prime, and go.
The DCR while an awesome pump, requires some modification and costs twice as much and the CPX.
In working on Powerstroke's most of my life, do it once, do it right. Replace the whole fuel system and spend the money so it doesn't happen again. Whether you go with the DCR or the CPX, you're resolving the root cause of the problem rather than band-aiding it.
The CPX would be my choice as it bolts right into the current setup with no modifications. All you have to do is time it, slap it in, prime, and go.
The DCR while an awesome pump, requires some modification and costs twice as much and the CPX.
In working on Powerstroke's most of my life, do it once, do it right. Replace the whole fuel system and spend the money so it doesn't happen again. Whether you go with the DCR or the CPX, you're resolving the root cause of the problem rather than band-aiding it.
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,258
Likes: 771
From: Houston, Texas
Originally Posted by Overkill2
I'm not going to pretend I know as much as a diesel mechanic but yeah, the DCR costs twice as much but will chew up bad fuel and corrosion that a modified CP4 will not... The root problem of the CP4 is that it's very sensitive to bad fuel and moisture, which could be a problem with modern ULSD. So while the modified CP4 apparently prevents contamination of the rest of the fuel system, it still does not address the issue of bad fuel when it hits the CP4. For me, I'd rather pay the money and get the DCR.
Lead Driver
Joined: Jan 2002
Posts: 8,696
Likes: 4,816
From: Itinerant
When searching for them they don't have much of a internet showing. Is this a new reimagined pump to the market as they call it? No real video promoting the pump redesign.
Would like to see some torture testing. God knows there enough pre-designed real world torture results out there.
Would like to see some torture testing. God knows there enough pre-designed real world torture results out there.
Mountain Pass
Joined: Nov 2018
Posts: 249
Likes: 21
@Toreador_Diesel please do that. I’m very interested in the CPX vs the other one. (Brain just quit on me) DCR. The little bit of reading I’ve done says average shop rate to replace the cp4 is about $700. Does that sound right?
Lead Driver
Joined: Feb 2022
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A tear down diagnostics will tell you if you need to replace the lines and injectors without digging down too deep into the project. Pull the intakes, then remove the flow regulator off the CP4 and flush the screen into a white container. If you see ANY silver or ANY debris, then you will need to replace everything. Chances are though, without a DPK, the injectors are already damaged and will need replacement. The lines are one time use and also need to be replaced.