Total fuel system replacement.
Hotshot
Joined: Oct 2006
Posts: 10,177
Likes: 8,048
From: Texas
BUT, they will not do that because then said improved pump could *POSSIBLY* also be refro fit to go in ALL 6.7 PSD’s since 2011. OOPS…. Ford *MIGHT* have to pay that bill when all the lawyers get done.
Fleet Mechanic
Joined: Aug 2022
Posts: 1,590
Likes: 1,118
Well, Ford *COULD* sit down with Bosch, Denso, or someone else that *COULD* design a better pump to fit where the existing CP4 is.
BUT, they will not do that because then said improved pump could *POSSIBLY* also be refro fit to go in ALL 6.7 PSD’s since 2011. OOPS…. Ford *MIGHT* have to pay that bill when all the lawyers get done.
BUT, they will not do that because then said improved pump could *POSSIBLY* also be refro fit to go in ALL 6.7 PSD’s since 2011. OOPS…. Ford *MIGHT* have to pay that bill when all the lawyers get done.
Of course they could; just explaining why they couldn't just go back to the CP-3 like Ram did.
Dave
More Turbo
Joined: Dec 2021
Posts: 604
Likes: 205
The uptick in threads recently, and more people complaining in the chat on the Powerstroke Tech Talk livestream finally got me to break down and buy the DPK. Figure I'll run it and if it ever blows replace it with the S&S/Stanadyne pump, https://ssdiesel.com/dcr/. Seems pretty interesting.
Odds are it will never fail, but 400 isn't a bad insurance policy, if it works as intended.
Odds are it will never fail, but 400 isn't a bad insurance policy, if it works as intended.
Hotshot
Joined: Oct 2006
Posts: 10,177
Likes: 8,048
From: Texas
And on the CP4, most folks never have an issue with them; but when someone does (like me @ 20,000 miles) have a tendency to lose faith in the system. Even tho the next truck went 60,000 miles with no issues, the CP4 was always in the back of my mind whenever I drove it.
Cargo Master
Joined: Feb 2005
Posts: 2,899
Likes: 185
The uptick in threads recently, and more people complaining in the chat on the Powerstroke Tech Talk livestream finally got me to break down and buy the DPK. Figure I'll run it and if it ever blows replace it with the S&S/Stanadyne pump, https://ssdiesel.com/dcr/. Seems pretty interesting.
Odds are it will never fail, but 400 isn't a bad insurance policy, if it works as intended.
Odds are it will never fail, but 400 isn't a bad insurance policy, if it works as intended.
The Bosch CP4 fuel pump has an unusually high failure rate in the U.S., upwards of 7%, when compared to 1% failure rate in Europe (from Google). This has to be contributed to the sorry diesel fuel here. Either add an additive or use diesel with bio in it. Then drain your fuel filter regularly- not once per year!
If this takes you down to the 1% failure rate that's a fairly small chance.
Fleet Mechanic
Joined: Aug 2022
Posts: 1,590
Likes: 1,118
Since I have a ESP with 100k miles left on it I am not doing anything until it's up.
The Bosch CP4 fuel pump has an unusually high failure rate in the U.S., upwards of 7%, when compared to 1% failure rate in Europe (from Google). This has to be contributed to the sorry diesel fuel here. Either add an additive or use diesel with bio in it. Then drain your fuel filter regularly- not once per year!
If this takes you down to the 1% failure rate that's a fairly small chance.
The Bosch CP4 fuel pump has an unusually high failure rate in the U.S., upwards of 7%, when compared to 1% failure rate in Europe (from Google). This has to be contributed to the sorry diesel fuel here. Either add an additive or use diesel with bio in it. Then drain your fuel filter regularly- not once per year!
If this takes you down to the 1% failure rate that's a fairly small chance.
But more likely Ford's failure rates aren't high enough for them to want to change. Again IMHO ford did a better job on the low pressure fuel system than GM or dodge. GM IIRC didn't even use a lift pump, which boggles the mind. Dodge has had a spoty reputable with lift pumps going back to the VP44, even the intank pumps of 2005+ were hardly adequate and only provided 8-12 psi to the pump. Ford on the other hand has a system that flows three times what is required with pretty good factory filtration at higher inbound pressure.
No idea if "less" is 1% or 6%....just pointing out that I believe the 7% number would be all US CP4 applications and isn't specific to the 6.7. As far as actual failure rates go, it looks like 5-7% on the Duramax which doesn't use a lift pump, the Ford failure rate is almost guaranteed to be less;
How Common Is CP4 Failure? (caffemotor.com)
Dave
Cargo Master
Joined: Jul 2011
Posts: 2,675
Likes: 979
From: Walpole, MA
No idea if "less" is 1% or 6%....just pointing out that I believe the 7% number would be all US CP4 applications and isn't specific to the 6.7. As far as actual failure rates go, it looks like 5-7% on the Duramax which doesn't use a lift pump, the Ford failure rate is almost guaranteed to be less;
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Brett Foote
Cargo Master
Joined: May 2002
Posts: 3,271
Likes: 229
From: Gulf Coast, FL
Quick update: after Ford told me they couldn’t get parts for 2months I looked south of the border and found my own- for $3k cheaper…
Dropped them off at Ford and they said, “thank you very much. Btw, none of these (OEM Ford parts) are covered under warranty as you did not buy them from a CDN Ford dealer.” Sheesh.
So, I went out and bought a nice, original owner ‘09 with a 6 speed manual and am doing a Ppumped 24v Cummins conversion. The Tremor will be going for sale as soon as it’s out of the shop. Bye bye overly complicated fuel system!
Dropped them off at Ford and they said, “thank you very much. Btw, none of these (OEM Ford parts) are covered under warranty as you did not buy them from a CDN Ford dealer.” Sheesh.
So, I went out and bought a nice, original owner ‘09 with a 6 speed manual and am doing a Ppumped 24v Cummins conversion. The Tremor will be going for sale as soon as it’s out of the shop. Bye bye overly complicated fuel system!
Lead Driver
Joined: May 2021
Posts: 5,886
Likes: 3,512
From: Uh oh, CA
The uptick in threads recently, and more people complaining in the chat on the Powerstroke Tech Talk livestream finally got me to break down and buy the DPK. Figure I'll run it and if it ever blows replace it with the S&S/Stanadyne pump, https://ssdiesel.com/dcr/. Seems pretty interesting.
Odds are it will never fail, but 400 isn't a bad insurance policy, if it works as intended.
Odds are it will never fail, but 400 isn't a bad insurance policy, if it works as intended.
Lead Driver
Joined: Feb 2022
Posts: 7,978
Likes: 4,055
Well, Ford *COULD* sit down with Bosch, Denso, or someone else that *COULD* design a better pump to fit where the existing CP4 is.
BUT, they will not do that because then said improved pump could *POSSIBLY* also be refro fit to go in ALL 6.7 PSD’s since 2011. OOPS…. Ford *MIGHT* have to pay that bill when all the lawyers get done.
BUT, they will not do that because then said improved pump could *POSSIBLY* also be refro fit to go in ALL 6.7 PSD’s since 2011. OOPS…. Ford *MIGHT* have to pay that bill when all the lawyers get done.
With S&S now having a viable non CP4 replacement pump that works better then the stock one, who's to say Ford can't be CA sued over it?
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Darren Moore
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Oct 9, 2021 05:25 PM