How do you prevent CP4 pump failure?
The problem with the CP4 pump is so well known that several companies sell expensive kits that cost up to $3,600 (before labor costs) to try to prevent the problem. Popular fixes involve boosting the fuel pressure with an additional pump, or replacing the CP4 with the more reliable, but less fuel efficient, CP3 pump. dieseltechmag.comImage: dieseltechmag.comTo prevent your 6.7Powerstroke engine’s CP4 failure, you should change or replace the fuel filters after each10-15,000 miles operation. You can also take some precautionary actions in advance, such as installing an EPA Compliant CP4 Disaster Kit.
Does the CP4 Disaster Prevention Kit work?
Since its debut in 2016, the original S&S 6.7L Power Stroke CP4 Bypass Kit (Disaster Prevention Kit) has safeguarded thousands of injectors from CP4 debris. In fact, it works so well that it has been copied by multiple opportunists within the aftermarket.
How common is CP4 failure?
But how common is CP4 failure? The CP4 has been documented to fail mostly in cases of 100,000 miles in the USA. Other forums have disclosed that the failure rate is within 5-7%, specifically for LML Duramax engines. Despite this, the pump is well cherished by a lot of diesel engine enthusiasts.
Do fuel additives help CP4?
So we all know the CP4 has problems , and some of the best techs say adding things like FPPF or Stanadyne fuel lubricant additives and changing your filters often will cut your chances of a disaster way down. not just any additive but the lubricant specific ones.
Will a lift pump prevent CP4 failure?
An aftermarket lift pump system is the most affordable way to keep the CP4. 2 alive. FASS, AirDog and Fuelab are the big names in town here. Each of them offer a complete system that not only provides sufficient fuel supply pressure for the CP4.
Is there a recall on CP4 pump?
Stellantis (FCA US, LLC) is recalling approximately 222,410 units of its 2019 to 2020 Ram 2500/3500 pickups and Ram 3500/4500/5500 Chassis Cabs equipped with the 6.7-liter Cummins turbo diesel. The recall-affected trucks are equipped with the Bosch CP4 high-pressure fuel pump (HPFP) that could fail prematurely.
How much does it cost to replace a CP4 pump?
The “CP4” injection pump, as it’s called by many, is the heart of these diesels, and in the past few years it has garnered a reputation for catastrophic failure, resulting in repair costs north of $8,000.
Why does CP4 need timed?
The CP4. 2 must be timed with both the engine’s crankshaft and camshaft to coincide perfectly with the injectors opening, and in both the 6.7L Power Stroke and LML Duramax the pump is driven by the engine’s camshaft.
Can you use too much diesel extreme?
You can easily add too much of a high-quality diesel fuel additive. What happens when you over-treat your diesel fuel? Overdosing can lead to a whole new list of fuel and engine issues from clogged filters to overall decreased engine performance and efficiency. If you’re losing lubricity, don’t over-treat.
What diesel additive should I use?
Diesel Extreme is the best additive in the game. This one adds seven points to diesel’s cetane score (which again improves the fuel’s combustion performance), and it cleans and lubricates injectors and other critical fuel system components. Diesel Extreme also helps remove excess water and contaminants from fuel.
How do you add lubricity to diesel fuel?
The superior remedy: AMSOIL diesel fuel additives
The best way to increase fuel lubricity is to use a fuel additive designed specifically for this purpose, like AMSOIL Diesel Injector Clean, Diesel All-In-One or Diesel Injector Clean + Cetane Boost.
How common is CP4 failure LML?
I have read that as much as 7% of CP4 fail on LML Duramax.
Should I put a lift pump on my LML?
Do you need a lift pump on your LML? You should strongly consider a lift pump for your LML (2011-2016 Duramax). Although there are many benefits a lift pump provides, your LML needs them for 2 main reasons, RELIABILITY & PERFORMANCE.
When did Ram stop using CP4 pump?
But that 15-year run came to an end in when Ram made the somewhat questionable decision to switch the injection pump to the CP4. 2. Diesel owners in the know were somewhat frustrated with this decision, but to understand why, we need to look at the track record of each pump.
Did Cummins go back to the CP3?
Not only did Stellantis, the new parent company of Ram since the FCA/PSA Group merger, find a way to revert back to the CP3 on the 6.7L Cummins engines supplied for its ’21-present trucks, but it announced a massive high-pressure fuel pump recall back in November for all ’19 and ’20 models.
Is the CP4 covered under warranty?
Yes they covered it. First thing they did was test for water in the diesel. When they found no water they covered the repair. He really had low mileage.
Is the CP4 2 better?
Although the CP4. 2 moves less fuel volume than the CP3 (roughly 20-percent less according to the output of LML Duramax CP4. 2’s), it is substantially more efficient and produces higher peak pressure (30,000 psi vs. 26,000 psi).
How hard is it to do a CP3 conversion?
The CP4. 2 to CP3 conversion is relatively straightforward (as much as it can be when accessing an injection pump sitting at the very front of a 6.6L Duramax LML engine’s valley).
What injection pump is on 2021 6.7 Cummins?
Per information from owners taking delivery of 2021 Ram pickups with Cummins diesel engines, as well as photos I’ve seen on social media, it appears that Ram/Cummins have gone back to the old Bosch CP3 fuel injection pump.
How do you stop a fuel pump from failing?
Two ways to reduce or eliminate fuel pump failures:
What fuel pump does the 2020 Cummins have?
The factory fuel system on your 6.7L Dodge Cummins consists of your underbed fuel tank, fuel or lift pump, high pressure CP4. 2 injection pump featuring a twin piston pump that can handle up to 39,000psi, and electronically controlled injectors (simplistically put).
What happens when a CP4 pump fails?
The CP4 pump has a tendency to tear itself apart from the inside for lack of technical terms. As it begins to fail, the CP4 starts shedding metal shavings and metal contaminants into the fuel. The high-pressure fuel then leaves the pump and travels through your fuel system towards your injectors.
Can I use diesel fuel additive to prevent CP4 pump failure?
Using a commercially available diesel fuel additive can be helpful, but cannot be guaranteed to prevent CP4 pump failure.
What happens if you don’t lubricate CP4 fuel?
Since the CP4 uses fuel as a lubricant, the lack of adequate lubrication can increase the amount of friction on the internal metal parts such as the drive cam and roller lifters. As a result, small metal particles or shavings begin to get distributed throughout the fuel system and can end in catastrophic failure.
What is the lubrication of a CP4 injection pump?
Lubricity is most commonly defined as the ability of a fluid to minimize the degree of friction between surfaces in relative motion under load conditions. The CP4 injection pump creates higher pressures with less volume than its predecessor, the CP3 pump.