We’ve all been concerned about the fuel pumps on the 6.7L. GM owners have filled a lawsuit about the same problem. Grenading fuel pump. Nothing really new just Interesting reading. I know several forum members left Ford over this problem and switched to GM. I wonder how they faired. Old news from August so most have probably already read. But I just noticed it
https://carbuzz.com/news/chevy-and-g...diesel-engines

 

My daughter and son in law’s truck had a fuel pump go bad, luckily it was still under warranty, so it was fixed. They traded it to a new 19 GMC. I gave him a bad time and told him he should’ve got a Ford, as he is a Chevy man. In doing some research, my daughter found that lawsuit. It seems that GM used a pump that was designed for European fuel. I wonder what the difference is, as Ford used the same fuel pump.

 

Because of the Bosch CP4.2 pump issues GM switched to the Denso HP4 pump in '17. Having said that if these people switched in '17 or later there's a good chance they faired pretty good on the fuel system.

The same group that's pushing this topic on GM will be going after Ford next.

 

Ford was and is using the same pump, Bosch CP4.2, as GM was as Troy mentioned. The only difference possibly, was that GM seemed to cover more via warranty than Ford did. I know that Ford did cover some under warranty but it seems like they were more critical about the failures and denied some. This is just conjecture on my part from what I've read. Not saying it's fact.

I'd love to know the numbers of failures, reasons why they failed and conditions under each failed unit, numbers of warranty coverage and denial of warranty for each brand Ford and GM. It would also be interesting to see why GM switched to Denso and why Ford stayed with Bosch. It would also be interesting to see why Ram went with Bosch on the Cummins. We'll never know but inquiring minds would love to know...

 

I sometimes wonder where our old buddy "Rikatic" is these days with his infamous Ford blowout. I'm sure he's much happier driving his Chevy. How ironic would it have been had he had same grenade happen on that truck. Sorry to bring up a bit of nostalgia...

 

A recall reading on RV.net he traded his Duramax truck (The Gold Standard per him) which had a CP3 on a Ram last year that also has a CP3 pump.

 

From the December 2019 issue of Diesel Power magazine:

 

My friend called me from Cullman AL last year, Said he was just driving along in his GM towing his 5th wheel (around 12 thou) and the truck lit up and quit running. He was on the side of the interstate. Anyway long story short his fuel pump had gernaded and wiped out the fuel system. He thought he was just a bit out of warranty and they were gonna charge him a little over 10 thou. But turned out they fixed it under warranty so all it cost him was a week in a Culman Motel. The guy maintains his truck and does not beat on it. No one offered him any reason except luck of the draw.

 

I had a 2012 Duramax, 6,000 miles into ownership the fuel pump grenaded, wiped out everything, including the DPF somehow, needless to say GM got that truck back and I went and bought a Ford, knowing they have the same fuel pump. I like how Ford incorporates a lift pump or as some get a little **** about DFCM into the equation. Cummins equipped Rams now utilize the CP4.2, if it was that bad why on earth is it still in use?

 

Through 2018, Ram/Cummins used the Bosch CP3 pump. AFAIK there have been no issues with that. 2019 they switched to the CP4.2, but with that, they are still not running as high of injection pressure (29,000 PSI) that Ford and GM were running so it is more or less still in the wait and see mode.
And now 2020 Ford is running them up to 36,000 PSI!!!!!! I wonder how that is going to work out for them!!! Hopefully OK!!

When I had my ‘15 PowerStroke,( F350 DRW) I had some kind of electronic glitch that Ford could not find or figure out. Started @ the first re-gen, went through 3 lift pumps, and the glitch (CEL would pop up, then go away). When I hauled it back to where I bought it and told them I wanted to KNOW what the hell was causing all this, they said the whole fuel system needed replacing. Which Ford warrantied. I again asked why did it go bad? What caused it? They could not answer that question. Since the state I bought it in would only lemon law up to 10,000GVW, that was out. But the dealer himself basically did a buy back, prorating the 20,000 miles I had put on it, and I drove out with a new ‘16 F350 DRW.

With

 

Pretty sure the Cummins is running the same high pressures as the PSD and Duramax, the whole point of the pump is higher pressures for emissions reasons and noise levels. Have heard of a couple failures so far and they are replacing the entire engine when the fuel system fails. Are we sure it’s the Bosch system on the 2020’s? I haven’t seen any hard evidence, but Bosch does offer a version of the CP4.2 that is capable of the 36k psi.GM switched to Denso, not sure if that was actually due to Bosch failures or if it was due to Bosch being right in the middle of every diesel emissions scandal

 

While they are running more than the CP3, they are maxing out the CP4 @ 29,000 PSI.

Edit: if this is what you heard, the guy that posted this “MIGHT” be a troll!!!!!!



Yup......MOPAR tech and calls it a “Cummings”!!!!! LOL

 

Let us not forget the Siemens pump in the 6.4 failed in a similar way and would send metal throughout the system, also if you look at the Denso HP4 on the new duramax engines, it’s a little more robust in construction, but if it fails will also fail in the same way as the CP4, the pump manufacturers are doing this, for reasons unbeknownst to me, but they are

 

You guys are bringing up some great points. Glad I'm subscribed to this. Time will tell on the new GM Denso HPFP mills and Cummins use of the CP4.2. It makes you wonder what was done to the Bosch pump with Ford upping the ante to 36k psi. We'll just have to wait and see...

And for a slight hijack: Desert Don, your sig of "Internet diagnostics..........unless you know exactly what to describe, and how to describe it, no one knows what exactly what to tell you. And if you DO know exactly what to describe and how to describe it.........you likely don’t need the internet answer!!!!!!! LOL" makes me think of some of who post here and the 99 - 16 Super Duty section, but I'm sure that's why you have that sig!!!

 

Hahahaha!!!!!! LOL. You are absolutely correct!
A post goes like, “ My truck don’t go, what you guys think is wrong with it?”
And just FYI, I use the same sig on all the forums that I am on!