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The Real Cost of CP4 Failure... & Why Owners Are Switching to the DCR Pump

The Real Cost of CP4 Failure... & Why Owners Are Switching to the DCR Pump

The Diesel Podcast Mar 10, 2026 68 min
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About this episode

The discussion dives into the challenges of the CP4 high-pressure fuel pump failures in 6.7L Power Stroke diesel engines and how SNS Diesel Motorsport's DCR pump offers a robust aftermarket solution. The conversation covers SNS's evolution from performance upgrades to reliability-focused products, highlighting the DCR pump's design improvements that prevent catastrophic system damage caused by CP4 failures. The episode also explains the technical differences between the CP4 and DCR pumps in an accessible way, emphasizing the importance of reliability for diesel owners facing costly repairs.

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Part

DCR pump

"I had you on a couple of years ago when when the SNS released the DCR pump and it took the took the industry by storm."

The DCR pump is a special part that helps diesel trucks get fuel better and run stronger.

Company

SNS Diesel Motorsport

"I had you on a couple of years ago when when the SNS released the DCR pump and it took the took the industry by storm."

SNS Diesel Motorsport makes parts that help diesel trucks run better and last longer, especially fuel system parts and electronics.

Term

electronic controls

"And we specialize in modern diesel fuel systems. And then also electronic controls that kind of go along with that. So modern diesel pickups really are what they are because of the fuel systems and the electronics that control everything."

Computers in diesel trucks help control when and how much fuel goes into the engine so it runs better and cleaner.

Concept

modern diesel fuel systems

"And we specialize in modern diesel fuel systems. And then also electronic controls that kind of go along with that."

Newer diesel engines have special parts that control how fuel gets to the engine, making the truck run better and cleaner.

Part

injectors

"So that's really our background and our specialty is high pressure fuel pumps, injectors."

Injectors are parts that squirt fuel into the engine so it can make power.

Part

high pressure fuel pumps

"So that's really our background and our specialty is high pressure fuel pumps, injectors."

These pumps push diesel fuel very hard into the engine so the truck can run strong and clean.

Concept

sled pull trucks

"And then on the racing competition side, we've got a motorsport division as well that has electronic controls, tuning that kind of thing for, you know, drag race vehicles, sled pull trucks,"

These trucks pull a heavy sled to see how strong and powerful they are.

Concept

drag race vehicles

"And then on the racing competition side, we've got a motorsport division as well that has electronic controls, tuning that kind of thing for, you know, drag race vehicles, sled pull trucks,"

These are vehicles built to race in a straight line very fast over a short distance.

Concept

motorsport division

"And then on the racing competition side, we've got a motorsport division as well that has electronic controls, tuning that kind of thing for, you know, drag race vehicles, sled pull trucks,"

They have a part of the company that makes special parts and computer settings for diesel trucks used in races and competitions.

Concept

land speed record racing

"bondable salt flats, land speed record racing, things like that. But most of the company is dedicated to fuel system manufacturing."

This is racing where the goal is to go faster than anyone else over a set distance.

Concept

reliability improvement products

"And a lot of the company now is also based on focused on reliability improvement products, really solving problems that are out there in the field. So, you know, performance is great. And that's what a lot of us are interested in is racing and really pushing the limits to the upper echelon of all that stuff. But what we keep getting for years and years is there's just really a lot more guys out there that need and want reliability as well."

These are parts made to help diesel trucks last longer and have fewer problems.

Term

CP3 conversion

"the reliability stuff early on, some of the first ones was like CP3 conversions for the LML Duramax platform and doing true drop in."

A CP3 conversion means swapping out the old fuel pump in a diesel truck for a newer, stronger one that works better and lasts longer.

Concept

aftermarket high pressure pump conversions

"the DCR pump was that came to fruition was a co-development between us and Standardine, Standardine's aftermarket division pure power and, you know, we were well known for our high pressure pump conversions reliability conversions on the Duramax platforms on some of the Cummins platforms and then it kind of came to the the DCR came about a collaboration between the two companies to really develop a complete, you know, conversion to get rid of the CP4 all together and get a more robust pump in there that can handle a little more of the everyday life."

Some companies make better pumps to replace the weak ones that break easily. These stronger pumps help stop big problems and expensive repairs.

Brand

Standardine

"the DCR pump was that came to fruition was a co-development between us and Standardine, Standardine's aftermarket division pure power and, you know, we were well known for our high pressure pump conversions reliability conversions on the Duramax platforms on some of the Cummins platforms"

Standardine is a company that makes better parts to fix problems with diesel engines, like stronger fuel pumps that don't break as easily.

Car

Ford F450

"did because he bought a brand new f450 had it uh had it hauled to his shop i think he said he had seven miles on it and uh immediately converted it"

The Ford F-450 is a big truck that can pull and carry heavy loads, used by people who need a tough work vehicle.

Part

CP4

"how does it work when you put one on your truck as far as you know is it just as simple as taking the factory cp4 out putting the dcr pump in hooking it all up and you're just ready to go yeah yeah it's it's just a drop in uh it's essentially it's it's really close to the same thing as just replacing the cp4 if you need to put a new cp4 in it anyways"

The CP4 is a part that pumps fuel into the engine at very high pressure. It helps the engine run but can sometimes break if the truck is pushed too hard.

Part

high pressure lines

"it's got new high pressure lines with it a new low pressure line assembly with it the pump itself an adapter plate in the hardware to do it so if you were going to replace the cp4 anyways your high pressure lines have to come out your low pressure lines have to come out the pump itself has to come out"

High pressure lines are special tubes that carry fuel from the pump to the engine at very high pressure so the engine can run properly.

Part

low pressure line assembly

"it's got new high pressure lines with it a new low pressure line assembly with it the pump itself an adapter plate in the hardware to do it so if you were going to replace the cp4 anyways your high pressure lines have to come out your low pressure lines have to come out the pump itself has to come out"

The low pressure line assembly is a set of tubes that bring fuel from the tank to the pump at normal pressure before it gets pushed harder.

Term

horsepower

"the dcr is a higher output pump higher capacity pump so for a guy who needs or wants that extra uh output extra horsepower it's got a lot more on tap so we've had them over 800 horsepower with a with a single dcr"

Horsepower is a way to measure how strong an engine is and how fast it can make a car go.

Term

OEM

"hit the the rail pressure or the the commands that the oem or the ecm wants without having to tune it"

OEM means the parts made by the same company that made your car, so they fit and work well.

Term

ECM

"hit the the rail pressure or the the commands that the oem or the ecm wants without having to tune it"

The ECM is the car's computer that controls how the engine runs, like when to add fuel or spark.

Concept

emissions testing and certification

"we know how factory calibrations work we know how emissions you know is created and we know what matters and all these things so we'll work with seamah garage and work with carb and emissions labs and stuff like that and do all the testing do all the validation work provide all the data and everything required to get it to where it's got the the eo you know number that's legal safe to sell in all 50 states"

This means checking that cars or parts don't pollute too much and are allowed by law to be sold and used.

Concept

inventory cost

"because we want whenever possible we want a shop to be able to source or to stock you know one thing and that doesn't matter if you got a 2012 truck that shows up that day or a 2025 truck shows up that day their cost of inventory is much lower if they're able to stock one part number"

Inventory cost is how much it costs a shop to keep parts in stock. Having one part that fits many trucks saves money.

Part

plastic canister filter

"...because those tend to be problematic too that plastic canister filter has also a reputation for failing cracking spraying fuel some fires..."

This is a fuel filter made with plastic on the outside. Sometimes it can crack and cause problems like leaks.

Part

quick connect fittings

"...and then the little quick connect fittings that go to those little barbs will break it's all plastic stuff..."

These are plastic parts that connect fuel lines together so they can be taken apart easily. But they can sometimes break.

Part

billet aluminum filter head

"...we've designed developed a really nice you know finish complete kit that goes to a billet aluminum filter head that mounts in the factory spot..."

This is a strong metal part that holds the fuel filter in place. It's made from a solid piece of aluminum, so it lasts longer.

Car

Lancia Beta

"...ciate that because they don't want to be the the beta tester for anything or any consumer there's not e..."

The Lancia Beta is an old Italian car that tried new things but sometimes had problems that made people wish they hadn't bought it first. It's like being the first person to try a new gadget that might not work perfectly yet. People talk about it when they mean someone who tries something new before it's fully ready.

Company

Hotshot Secrets

"these issues is a lack of lubricity. Our friends over at Hotshot Secrets have developed a formula that boosts performance and then addresses this issue"

Hotshot Secrets makes special liquids you add to diesel fuel to help your diesel engine run better and last longer.

Concept

diesel truck

"that in their truck and not have to worry about it because you're paying a premium for a diesel truck you shouldn't have to be nervous driving right like you shouldn't have to go around like oh boy i wonder if i got good fuel this time or not"

A diesel truck uses a special kind of fuel called diesel, which helps it pull heavy loads and go a long way without needing much gas.

Term

VP44 injection pump

"people have a tendency to idolize those 12 valves or those vp44 trucks to those 73 obs trucks they're great they're amazing they're they're classic trucks"

The VP44 is a part that helps send fuel into diesel engines, controlled by electronics, but sometimes it can break.

Concept

12 valve

"people have a tendency to idolize those 12 valves or those vp44 trucks to those 73 obs trucks they're great they're amazing they're they're classic trucks"

The 12 valve is an older type of diesel engine that is simple and strong, often found in older trucks.

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