Maybe a new truck Ford or Dodge?

[Snobdds]

My understanding is the CP4 is highly sensitive to water in the fuel, where the CP3 is not as sensitive.

However, they're both extremely sensitive in contrast prior methods of providing fuel to the motor.

 

[Too many Kubotas]

I've read that the cam follower can end up a bit sideways, sending shrapnel through the system. Somewhat like the new hydraulic lifters in the Cummins.

 

[sd455dan]

I've read that the cam follower can end up a bit sideways, sending shrapnel through the system. Somewhat like the new hydraulic lifters in the Cummins.

YEP Like 90* sideways. CP 3 is just a more robust unit. CP 3 has higher flow volume as well. It just doesn't make as much pressure.

Some cases it is so violent when the failure happens, it can break the engines cam / crank gears.
The scary thing is the engine dies suddenly and no chance of restart. That can lead to some bad situations.

Ford is in it now too.

https://fordauthority.com/2023/09/ford-super-duty-lawsuit-filed-over-defective-fuel-pumps/

 

[Snobdds]

again...it root cause is water in the fuel.

It's been a thing since 2011 for all three that run the cp3/cp4.

 

[sd455dan]

again...it root cause is water in the fuel.

It's been a thing since 2011 for all three that run the cp3/cp4.

I wonder how many warrantee's have been denied using that exact blanket statement?


How many Fewer CP3 failures on less well maintained CP3 equipped diesels built all the way back to 2001?

The Forged steel 3 cylinder CP 3 has a better reliability record than the 2 cylinder Aluminum CP 4 It also does not contaminate the entire injection system if a failure does happen.

CP 4 failure rates are reported as being over 7%. That number will undoubtedly trend upward as they get as old as the 20 year old CP3's that are still plugging along.

A Good older Video on the differences between CP 3 and CP 4

 

[Hay Dude]

again...it root cause is water in the fuel.

It's been a thing since 2011 for all three that run the cp3/cp4.

Thing is, Ram only ran it for a few years.
Ram also replaced any CP-3 failed or not, free of charge.
Ford waited until they broke and ran them much longer than Ram
Thats a big difference.
I was given a loaner truck while they did mine (2 days)

 

[Hay Dude]

View attachment 838163

Pfffttt Thats a light load. Maybe what 11-12 tons?
Cute, but how do we know that Ram is just being transported for someone?

Just because a truck, tractor, etc is on a trailer, don’t mean it’s broke.

 

[Hay Dude]

What made Cp4 fail on Rams and not fords or chevy?

I believe you are confusing failure rate with replacement rate.

Ram replaced all CP-4 pumps, broken or working.
Ford only replaced them after they failed and left the owner stuck on the roadside.

That means Ram replaced all pumps, Ford is doing them one at a time as they break, which creates more angry Ford owners & future Ram owners

 

[Hay Dude]

Some people with Rams were able to get their cp4 pumps replaced quickly while other's waited for 7 months. Sometimes it comes down to parts supply, the dealer, and just dumb luck instead of who made the truck.

Ram cp4 failure thread - Post all CP4 failures here DO NOT start a new thread.

RamCares Cp4 service solution updates - (Y78) CP4 recall issued by FCA - 2020 Parts Available May 10

As an owner of a truck that received a replacement, my tech told me that post covid, there wasn’t enough CP-3 pumps in world inventory, so Ram replaced failed pumps first, then took trucks like mine in with working pumps as the replacement campaign got going.

Still lots of Fords running around with future “glitter bombs” on board.

 

[Hay Dude]

YEP Like 90* sideways. CP 3 is just a more robust unit. CP 3 has higher flow volume as well. It just doesn't make as much pressure.

Some cases it is so violent when the failure happens, it can break the engines cam / crank gears.
The scary thing is the engine dies suddenly and no chance of restart. That can lead to some bad situations.

Ford is in it now too.

https://fordauthority.com/2023/09/ford-super-duty-lawsuit-filed-over-defective-fuel-pumps/

My dealer told me the Ram replacement campaign was wrapping up this past summer. They said they sold over 500 of the CP-3 trucks and they were done with the ones they sold.

The CP-4 definitely ran higher pressure. My truck started in less than a second with the CP-4. The newer lower pressure pump takes longer to start.