High Pressure Fuel Pump (CP4) *OFFICIALLY* Dead

Terryw123 said:
All 3 of our ambulances that have had the CP4 failures were in the 165,000 mile range. Additionally they have all been driven under the worst conditions by kids that don’t know diesel engines. So hopefully it’s something else.
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So a component that is soo weak and notorious for failure can go this long under extreme use and abuse? That's not bad actually.

I decided to end my endless worry at 70K under my circumstances with the utmost care and rigorous intervals that I use by throwing in an DCR.
 
Ok. I’m older, it’s my first diesel, and I have seen the videos and read the threads about this important issue/concern. My question that I couldn’t determine has been asked and answered already is this: if installing the latest S&S version of the DPK fuel pump is the way to go for folks like me (27k, 2022) does it cancel the factory warranty or any extended warranties? I’m willing to spend the $ to avoid the CP4 failure. To be honest, Ford and other warranty services should thank anyone who installs these by keeping in force the terms of the warranty plans. Thanks.

And I’m sorry as well that the OP is experiencing this.
 
DDD said:
Ok. I’m older, it’s my first diesel, and I have seen the videos and read the threads about this important issue/concern. My question that I couldn’t determine has been asked and answered already is this: if installing the latest S&S version of the DPK fuel pump is the way to go for folks like me (27k, 2022) does it cancel the factory warranty or any extended warranties? I’m willing to spend the $ to avoid the CP4 failure. To be honest, Ford and other warranty services should thank anyone who installs these by keeping in force the terms of the warranty plans. Thanks.

And I’m sorry as well that the OP is experiencing this.
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It shouldn't affect your warranty, but it won't prevent a CP4 failure. It will only protect the rest of your fuel system in the event of a CP4 failure. Disaster Prevention Kit - just protects downstream fuel system, but is worthwhile to prevent a $10,000-$15,000 fuel system replacement instead of just a fuel pump replacement.
 
DFS said:
It shouldn't affect your warranty, but it won't prevent a CP4 failure. It will only protect the rest of your fuel system in the event of a CP4 failure. Disaster Prevention Kit - just protects downstream fuel system, but is worthwhile to prevent a $10,000-$15,000 fuel system replacement instead of just a fuel pump replacement.
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💯 % agree, exactly what I have in place, as the CP4 may never fail. If it does it is then I will do the DCR.
 
bbrett said:
Update email From the shop it’s at “Checked that low fuel pressure pump was coming on key on engine off. Pumps runs for 30 seconds normal operation. Disconnected fuel line at secondary fuel filter to check for fuel flow out of filter. Attached fuel pressure to low fuel pump pump reaches 150 psi. Removed fuel pressure sensor A to checked for metal contamination none found and good fuel flow to high pressure fuel pump. Continue testing fuel rail pressure sensor pcm desire pressure vs actual pressure do not match. Fuel rail pressure get to about 800 psi when cranking engine should be above 3000 psi. High pressure fuel pump not creating enough pressure. Recommend removing fuel volume control valve at high pressure control valve to inspect for metal contamination.”
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Sounds like you have a competent shop, as they are going through the troubleshooting correctly. In order to remove the pressure control valve the intake has to be removed. The valve is on top of the existing CP4. Once removed there is a metal screen. It is there if there is "glitter" ( metal particles) will be. If the CP4 is compromised, now is the time to install a DCR, and the entire fuel system most likely is also compromised. Good Luck
 
bbrett said:
First of all.. Well I'm not even going to fully respond to that. I drive my truck maybe 6,000-8,000 a year. I maintain the truck, and do the recommended service. I purchased the maintenance plan from Ford, so they won't do off-cycle oil changes or maintenance on the plan even if I bring it in.

Second of all.. well again I'm already not in the best mood from all of this so I don't need to respond to a condescending comment since that's how I'm interpreting it without you knowing the full situation. I'm not a mechanic, I'm entrusting what a shop is telling me and I was 30-40miles from home. So I'm not just going to park it on the side of the road if they tell me it's safe to drive home.

It's now at a diesel specialty shop and not at the dealership since it's not in warranty anymore.
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Nothing like being kicked while you’re down! Jeez!
I suppose I’m in for it too, as I don’t change my oil every other weekend either. 😁. And oil actually has gotten fairly expensive according to my budget.
Just know that most of us are really empathizing with you, and are of a mindset to hope for the best, rather than bash you.
Any chance it’s that damn fuse box again?
 
DDD said:
Ok. I’m older, it’s my first diesel, and I have seen the videos and read the threads about this important issue/concern. My question that I couldn’t determine has been asked and answered already is this: if installing the latest S&S version of the DPK fuel pump is the way to go for folks like me (27k, 2022) does it cancel the factory warranty or any extended warranties? I’m willing to spend the $ to avoid the CP4 failure. To be honest, Ford and other warranty services should thank anyone who installs these by keeping in force the terms of the warranty plans. Thanks.

And I’m sorry as well that the OP is experiencing this.
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I hope I can clarify for you since I experienced a bit of confusion when first hearing these terms that both start with "D".

DPK = Disaster Prevention Kit. It is a reroute of the flow of the fuel system so it goes through a filter before heading to the injectors, said filter being there to catch all the glittery metal particles if the CP4 pump decides to eat itself, thereby saving everything downstream of the CP4. This is the less expensive option, parts kit is in the hundreds, not thousands. Plus labor.

DCR = entirely different fuel pump that replaces the CP4. Not as fragile. Not expected to have the issues of the CP4. More expensive, kit is in the thousands I believe, plus labor.

Two "best practices" philosophies plus one other:
  1. Bite the bullet and just replace the CP4 with the DCR. $$$
  2. Install the DPK and know that the rest of your fuel system is protected if the CP4 goes to pieces. $$
  3. Do nothing and hope for the best. Use a good fuel additive, check the water separator frequently, like every oil change, change diesel filters more often than factory suggested intervals. Attempt a warranty or insurance claim in case of failure. A valid strategy if you replace your truck every 3-5 years before the warranty expires. $
Many folks endorse the strategy of Disaster Prevention Kit, then replacement of pump with the DCR if the OEM pump fails. A great bang for the buck option. Others who really do go way off road and absolutely need to be able to get back to civilization or to have nearly no unplanned downtime on their truck may choose to just go straight to the DCR pump, cost be damned.

I hope this helps anyone experiencing confusion over this. I also hope it's not wrong. 😅
Corrections and additions welcome.
 
Winterized said:
I hope I can clarify for you since I experienced a bit of confusion when first hearing these terms that both start with "D".

DPK = Disaster Prevention Kit. It is a reroute of the flow of the fuel system so it goes through a filter before heading to the injectors, said filter being there to catch all the glittery metal particles if the CP4 pump decides to eat itself, thereby saving everything downstream of the CP4. This is the less expensive option, parts kit is in the hundreds, not thousands. Plus labor.

DCR = entirely different fuel pump that replaces the CP4. Not as fragile. Not expected to have the issues of the CP4. More expensive, kit is in the thousands I believe, plus labor.

Two "best practices" philosophies plus one other:
  1. Bite the bullet and just replace the CP4 with the DCR. $$$
  2. Install the DPK and know that the rest of your fuel system is protected if the CP4 goes to pieces. $$
  3. Do nothing and hope for the best. Use a good fuel additive, check the water separator frequently, like every oil change, change diesel filters more often than factory suggested intervals. Attempt a warranty or insurance claim in case of failure. A valid strategy if you replace your truck every 3-5 years before the warranty expires. $
Many folks endorse the strategy of Disaster Prevention Kit, then replacement of pump with the DCR if the OEM pump fails. A great bang for the buck option. Others who really do go way off road and absolutely need to be able to get back to civilization or to have nearly no unplanned downtime on their truck may choose to just go straight to the DCR pump, cost be damned.

I hope this helps anyone experiencing confusion over this. I also hope it's not wrong. 😅
Corrections and additions welcome.
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Very well stated!! All l have to add is l am in the DPK club, and will also say if your CP4 eats itself l have been told with the DPK your truck will still drive (not normal) and you can get where you need to go. Then proceed to installing a DCR.
 
Winterized said:
I hope I can clarify for you since I experienced a bit of confusion when first hearing these terms that both start with "D".

DPK = Disaster Prevention Kit. It is a reroute of the flow of the fuel system so it goes through a filter before heading to the injectors, said filter being there to catch all the glittery metal particles if the CP4 pump decides to eat itself, thereby saving everything downstream of the CP4. This is the less expensive option, parts kit is in the hundreds, not thousands. Plus labor.

DCR = entirely different fuel pump that replaces the CP4. Not as fragile. Not expected to have the issues of the CP4. More expensive, kit is in the thousands I believe, plus labor.

Two "best practices" philosophies plus one other:
  1. Bite the bullet and just replace the CP4 with the DCR. $$$
  2. Install the DPK and know that the rest of your fuel system is protected if the CP4 goes to pieces. $$
  3. Do nothing and hope for the best. Use a good fuel additive, check the water separator frequently, like every oil change, change diesel filters more often than factory suggested intervals. Attempt a warranty or insurance claim in case of failure. A valid strategy if you replace your truck every 3-5 years before the warranty expires. $
Many folks endorse the strategy of Disaster Prevention Kit, then replacement of pump with the DCR if the OEM pump fails. A great bang for the buck option. Others who really do go way off road and absolutely need to be able to get back to civilization or to have nearly no unplanned downtime on their truck may choose to just go straight to the DCR pump, cost be damned.

I hope this helps anyone experiencing confusion over this. I also hope it's not wrong. 😅
Corrections and additions welcome.
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Beautiful job at putting this together @Winterized 🏆 🏆 🏆

I fall in the last paragrah, where I was exhausted of chancing failure like you described and I bit the bullet. As many of us have suspected, it would probably never go (900K on a hot shot rig says a lot) especially with the care and maintenance I follow but I didn't want to be 150 miles away from civilazation, stranded in 115F heat having to not only wait for back up but a recovery rig to drag me out.

My rig went in for a full set of MDP (or whatever they're now called) pipes and figured it would be the time to do it.

I will have a factory CP4 if anyone wants it as back up.
 
Potato Wilson said:
Nothing like being kicked while you’re down! Jeez!
I suppose I’m in for it too, as I don’t change my oil every other weekend either. 😁. And oil actually has gotten fairly expensive according to my budget.
Just know that most of us are really empathizing with you, and are of a mindset to hope for the best, rather than bash you.
Any chance it’s that damn fuse box again?
Click to expand...
I have friends who love to drink wine but live on a beer budget.
 
Confirmed it is a bad CP4. truck was towed to a diesel performance shop earlier today. The shop It was at said they weren't equipment to do this work. They will be putting in a DCR, and replacing the reset of the fuel system, injectors etc. :/ While they're at it I have the 60 GAL SB Filter tank going in. Hopefully should have my truck back in a week or two.
 
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DDD said:
Ok. I’m older, it’s my first diesel, and I have seen the videos and read the threads about this important issue/concern. My question that I couldn’t determine has been asked and answered already is this: if installing the latest S&S version of the DPK fuel pump is the way to go for folks like me (27k, 2022) does it cancel the factory warranty or any extended warranties? I’m willing to spend the $ to avoid the CP4 failure. To be honest, Ford and other warranty services should thank anyone who installs these by keeping in force the terms of the warranty plans. Thanks.

And I’m sorry as well that the OP is experiencing this.
Click to expand...
Not a fan of the dpk in my mind the right way is to get rid of that sob all together and do a dcr swap
 
That sucks - but will be nice to have it back and know you have a great system in place. Hope it gets done quick and is not to painful ($$$$).

Interested to know, if you want to share, how many miles on your truck - just for reference when the CP4 failed?
 
Cux211 said:
Not a fan of the dpk in my mind the right way is to get rid of that sob all together and do a dcr swap
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Lol, your opinion. Why spend 3500.00 on a DCR when the cp4 may never fail, but if it does the DPK will get you to where your going then do the DCR. Cp4 failures are few.
 
It sucks that this happened but your truck will come out better and stronger in the end.
I give it a B+. You'll be able to add "Bulletproof" to "Beautiful" and "Badass". ;)
 
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