Is CP4 still a problem?
Mountain Pass
Joined: Sep 2021
Posts: 104
Likes: 56
We are sorry hear the bad news.
there is so many factors on things that blow up the CP4 that every precuation is worth taking. example...after getting fuel I noticed my egt was a few hundred degrees higher than normal. I quickly pulled over and did a fuel flash test to see if there was any gas in the deisel I bought....my test was ok.
a handful of us have been high advocates of folks getting gen2 DPK kits installed.
in your case...as mentioned...some insurance companies cover this under comprehensive policy. if the dealer ship is saying your fuel is contaminated....let them put that in writing and send the document to you insurance .
there is so many factors on things that blow up the CP4 that every precuation is worth taking. example...after getting fuel I noticed my egt was a few hundred degrees higher than normal. I quickly pulled over and did a fuel flash test to see if there was any gas in the deisel I bought....my test was ok.
a handful of us have been high advocates of folks getting gen2 DPK kits installed.
in your case...as mentioned...some insurance companies cover this under comprehensive policy. if the dealer ship is saying your fuel is contaminated....let them put that in writing and send the document to you insurance .
Hotshot
Joined: Jul 2013
Posts: 14,266
Likes: 2,187
anything that will hold a tablespoon of fuel will work...lid from a jar...one of those magnetic parts trays...a tuna fish can...etc. you drain a small amount of diesel fuel.....place some in your test tin....and just drop a match into it. if pure diesel the match will go off...diesel does not flash...if the diesel is contaminated with gas...you will see a flash as the match hits the diesel..the mathc will go out.
so basically...if the fuel would have flashed....that would tell me the last refuel involved diesel contaminated with gasoline.
now...assume that the fuel was 100% gasoline....lighting a tablespoon of it in a metal tin would just cuase a larger flash .....its not going to explode.
I carry a fire estinguisher and am comfortable with using this method of testing.
Mountain Pass
Joined: Sep 2021
Posts: 104
Likes: 56
so the fuel flash test I used is to test diesel for the presense of gas.
anything that will hold a tablespoon of fuel will work...lid from a jar...one of those magnetic parts trays...a tuna fish can...etc. you drain a small amount of diesel fuel.....place some in your test tin....and just drop a match into it. if pure diesel the match will go off...diesel does not flash...if the diesel is contaminated with gas...you will see a flash as the match hits the diesel..the mathc will go out.
so basically...if the fuel would have flashed....that would tell me the last refuel involved diesel contaminated with gasoline.
now...assume that the fuel was 100% gasoline....lighting a tablespoon of it in a metal tin would just cuase a larger flash .....its not going to explode.
I carry a fire estinguisher and am comfortable with using this method of testing.
anything that will hold a tablespoon of fuel will work...lid from a jar...one of those magnetic parts trays...a tuna fish can...etc. you drain a small amount of diesel fuel.....place some in your test tin....and just drop a match into it. if pure diesel the match will go off...diesel does not flash...if the diesel is contaminated with gas...you will see a flash as the match hits the diesel..the mathc will go out.
so basically...if the fuel would have flashed....that would tell me the last refuel involved diesel contaminated with gasoline.
now...assume that the fuel was 100% gasoline....lighting a tablespoon of it in a metal tin would just cuase a larger flash .....its not going to explode.
I carry a fire estinguisher and am comfortable with using this method of testing.
Laughing Gas
Joined: Dec 2017
Posts: 1,002
Likes: 641
From: Miami, Fl
I just got the bad news yesterday that my CP4 has sent metal bits through the whole fuel system. This is insane, I had no idea that I could have such a big repair bill for no reason. They say contaminated fuel, but it isn't water, so what is it? Now that diesel in about $2.00 more than gas, I wish I had bought a gas burner. Ford and the other members of big three should be ashamed for building something so fragile and then calling it "Super Duty".
I have a 2015 F350 with 242k miles that I recently picked up. I'm in the process of cleaning it up and doing all the fluids as I do not know the maintenance history of the truck. I have the CP4 disaster kit sitting here in its box waiting to go on. I need to do that sooner than later.
Hotshot
Joined: Jul 2013
Posts: 14,266
Likes: 2,187
Lead Driver
Joined: Feb 2005
Posts: 7,938
Likes: 2,651
From: The Great State of Texas
My plan is for my truck to last forever and so far my plan is working.
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Laughing Gas
Joined: Jul 2020
Posts: 975
Likes: 458
Same here, 1000 plus miles a week only spare parts I have with me is the short hose on the fuel filter. I never did like how much you had to flex it to change filter so I picked one up and thru it in the glove box.
Hotshot
Joined: Jul 2013
Posts: 14,266
Likes: 2,187
The sky's not falling like some would like for us to believe. I simply drive my truck, replace fuel filters every 20k miles with proper purging to reduce air pockets in the fuel lines, and drain the water separator maybe every other month. With 250k miles so far all is good.
My plan is for my truck to last forever and so far my plan is working.
My plan is for my truck to last forever and so far my plan is working.
the problem is not that the sky is falling….the problem is that ford won’t stand behind their implementation flaws ….many report cp4 failures and most report their comprehensive insurance had to cover it.
ford blames water cussed by no ford means….duh…they are admitting their water separator does not work.
ford blames fuel contamination caused by non ford means….duh…they are admitting their filtration system does not work.
the failure would be easier to swallow if ford stepped it up and covered it.
you can google search cases of cp4 failures and at the same time you can google search fold that post they never had a problem and don’t know anyone who does.
seek and you shall find… but not on my dime…my DPK is installed..so I no longer worry about it at all.
FTE Legend
Joined: Mar 2017
Posts: 31,880
Likes: 9,175
From: Western NY
the problem is not that the sky is falling….the problem is that ford won’t stand behind their implementation flaws ….many report cp4 failures and most report their comprehensive insurance had to cover it.
ford blames water cussed by no ford means….duh…they are admitting their water separator does not work.
ford blames fuel contamination caused by non ford means….duh…they are admitting their filtration system does not work.
the failure would be easier to swallow if ford stepped it up and covered it.
you can google search cases of cp4 failures and at the same time you can google search fold that post they never had a problem and don’t know anyone who does.
seek and you shall find… but not on my dime…my DPK is installed..so I no longer worry about it at all.
ford blames water cussed by no ford means….duh…they are admitting their water separator does not work.
ford blames fuel contamination caused by non ford means….duh…they are admitting their filtration system does not work.
the failure would be easier to swallow if ford stepped it up and covered it.
you can google search cases of cp4 failures and at the same time you can google search fold that post they never had a problem and don’t know anyone who does.
seek and you shall find… but not on my dime…my DPK is installed..so I no longer worry about it at all.
Lead Driver
Joined: Feb 2022
Posts: 7,975
Likes: 4,047
the problem is not that the sky is falling….the problem is that ford won’t stand behind their implementation flaws ….many report cp4 failures and most report their comprehensive insurance had to cover it.
ford blames water cussed by no ford means….duh…they are admitting their water separator does not work.
ford blames fuel contamination caused by non ford means….duh…they are admitting their filtration system does not work.
the failure would be easier to swallow if ford stepped it up and covered it.
you can google search cases of cp4 failures and at the same time you can google search fold that post they never had a problem and don’t know anyone who does.
seek and you shall find… but not on my dime…my DPK is installed..so I no longer worry about it at all.
ford blames water cussed by no ford means….duh…they are admitting their water separator does not work.
ford blames fuel contamination caused by non ford means….duh…they are admitting their filtration system does not work.
the failure would be easier to swallow if ford stepped it up and covered it.
you can google search cases of cp4 failures and at the same time you can google search fold that post they never had a problem and don’t know anyone who does.
seek and you shall find… but not on my dime…my DPK is installed..so I no longer worry about it at all.
Do you think Ford is the only one? GM for years had crap quality steel for their brake lines that rotted out in a few years. What did GM do? Nothing. Oh they rusted out? we can replace them for $800. There were a LOT more trucks with rotted out brake lines the GM ignored than CP4 issues with the SD trucks. Frankly I would rather the CP4 failed and left me on the side of the road than have the brake lines fail and possibly leave me or someone else DEAD.
At least the CP4 issue can be mitigated easily, the brake lines on the GM, if you aren't aware of the issue, it can come as a complete surprise when you go to stop, and can't. Been there, DONE that, Never ever will I own a GM again!
Cargo Master
Joined: Feb 2020
Posts: 2,277
Likes: 949
Do you think Ford is the only one? GM for years had crap quality steel for their brake lines that rotted out in a few years. What did GM do? Nothing. Oh they rusted out? we can replace them for $800. There were a LOT more trucks with rotted out brake lines the GM ignored than CP4 issues with the SD trucks. Frankly I would rather the CP4 failed and left me on the side of the road than have the brake lines fail and possibly leave me or someone else DEAD.
At least the CP4 issue can be mitigated easily, the brake lines on the GM, if you aren't aware of the issue, it can come as a complete surprise when you go to stop, and can't. Been there, DONE that, Never ever will I own a GM again!
At least the CP4 issue can be mitigated easily, the brake lines on the GM, if you aren't aware of the issue, it can come as a complete surprise when you go to stop, and can't. Been there, DONE that, Never ever will I own a GM again!
Good times.
Trailering
Joined: Mar 2018
Posts: 23
Likes: 3
From: back of my trailer
The 22 6.7 Powerstroke has the Bosch CP4.2. It has been modified through the years to increase the amount of fuel with the later higher power ratings.
There's nothing to fix IMO (sure the rollers could be pinned in their respective bores in the pump body) but with that said, you have to realize it's a potential problem that can happen but that does not mean it will.
Yes, you came across threads here where the CP4.2 has blown up but like with any modern high pressure common rail diesel engine, bad fuel would not be good for any modern day diesel engine's fuel system. People who own modern diesels have to cognizant of the fuel they use and the maintenance of the fuel system.
Yes, GM did switch to the Denso HPFP away from the the Bosch 4.2 but like I said, bad fuel could or would potentially cause damage to the Denso system as well.
Yes, I have an S&S DPK 2nd gen kit on tap to install on my 6.7 but this is to prevent total fuel system contamination if or when my HPFP goes as I am going out past the warranty period of 7 years or 125k miles. If you keep in mind where you buy fuel, drain your filter/water separator and potentially use a fuel additive that you are comfortable with, you should be fine. But yes, the possibility of a fuel system problem due to bad fuel is always a potential problem due to the high pressures now used and smaller tolerances in the fuel injection system also.
Just my take on it.
There's nothing to fix IMO (sure the rollers could be pinned in their respective bores in the pump body) but with that said, you have to realize it's a potential problem that can happen but that does not mean it will.
Yes, you came across threads here where the CP4.2 has blown up but like with any modern high pressure common rail diesel engine, bad fuel would not be good for any modern day diesel engine's fuel system. People who own modern diesels have to cognizant of the fuel they use and the maintenance of the fuel system.
Yes, GM did switch to the Denso HPFP away from the the Bosch 4.2 but like I said, bad fuel could or would potentially cause damage to the Denso system as well.
Yes, I have an S&S DPK 2nd gen kit on tap to install on my 6.7 but this is to prevent total fuel system contamination if or when my HPFP goes as I am going out past the warranty period of 7 years or 125k miles. If you keep in mind where you buy fuel, drain your filter/water separator and potentially use a fuel additive that you are comfortable with, you should be fine. But yes, the possibility of a fuel system problem due to bad fuel is always a potential problem due to the high pressures now used and smaller tolerances in the fuel injection system also.
Just my take on it.
I did all those things and had fuel pump failure in my driveway at 17,242 on the odometer. Two different labs tested my fuel, each with the same result: only diesel in the sample.
Trailering
Joined: Mar 2018
Posts: 23
Likes: 3
From: back of my trailer
I just got the bad news yesterday that my CP4 has sent metal bits through the whole fuel system. This is insane, I had no idea that I could have such a big repair bill for no reason. They say contaminated fuel, but it isn't water, so what is it? Now that diesel in about $2.00 more than gas, I wish I had bought a gas burner. Ford and the other members of big three should be ashamed for building something so fragile and then calling it "Super Duty".
