Are there any problems with the CP4 fuel pump?
Why Is the CP4 Pump Allegedly Failing? The primary reason the CP4 pump is said to fail is because the pump was not designed for diesel fuel in the United States. Bosch is a European company, and Europe uses diesel fuel with more sulfur than U.S. diesel fuel. The CP4 high-pressure fuel injection pumps allegedly cannot handle U.S. diesel fuel specifications. The class action lawsuit alleges the fuel pumps have lubrication and water content problems, forcing the pumps to run dry and causing metal to rub against metal.
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.
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 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.
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.
What years did Ford use the CP4 pump?
The CP4 was standard equipment on the Ford 6.7L Powerstroke. From 2011-2016 GM also used the CP4 in the LML & LGH Duramax engines, switching to the Denso HP4 in 2017 when the L5P was released.
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.
How common is CP4 failure LML?
I have read that as much as 7% of CP4 fail on LML Duramax.
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).
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.
Does the CP4 bypass 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 can you tell the difference between CP3 and CP4 pumps?
Basically whe a cp3 quits working it just quits without exploding. It’s typically a slow decline. The cp4 on the other hand doesn’t have a pinned piston and if it rotates slightly it tends to explode and send tiny bits of metal all through your fuel system.
How do I know if my CP3 pump is bad?
There may be a surge at idle due to low or no fuel supply pump pressure to the high-pressure pump. Knocking can be heard if the actual versus desired are too far apart which may be a bad FCA or Fuel Control Actuator.
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).
Does Ford cover CP4 failure?
What is more, the “repair” cost for a catastrophic CP4 failure is frequently upwards of $10,000, a cost which Ford generally refuses to cover under warranty by blaming the consumer for “fuel contamination” — contamination which is caused by the shredding CP4 itself.
Does 2020 powerstroke have CP4?
The BOSCH® OEM New pump is brand new, with every piece on the pump being new, same as you would get from your local Ford dealer. This pump features all the most up to date components from BOSCH® and features a 3 year, unlimited mileage warranty.
Does L5P have CP4?
Duramax L5P Reliability
The L5P is considered the most reliable post-emissions Duramax made to date. With the removal of the CP4.
What fuel pump is in a 2021 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.
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.
Is the LML Duramax a good engine?
The LML Duramax is a great engine. It is powerful, efficient, and durable. The LML is the most powerful Duramax engine ever produced. The LML was first introduced in the 2011 model year GMC and Chevy HD trucks.
What is LML Duramax?
LML. The 6.6L RPO LML (VIN code “8”) is . It is a further advanced version of the LMM engine with the majority of the changes addressing a required drastic reduction in engine emissions.
Is there a problem with the CP4 fuel filter?
The pump was changed/updated (still CP4) and there have been very few problems. If you still get water in your fuel, it will still take the pump out. The fuel filter design was changed for 17MY and seems to be solid as far as keeping water out. I wouldn’t have any concerns buying one (heck I did).
How often do Bosch CP4 fuel pumps fail?
Although the plaintiff’s trucks allegedly suffered fuel pump failures when the trucks had more than 100,000 miles on them, the lawsuit alleges the CP4 pumps often fail at less than 50,000 miles. The lawsuit also says some GM trucks have made it less than 10,000 miles before the Bosch pumps failed.
How do I know if my CP4 fuel pump is bad?
Remove the CP4 pump and then the fuel pressure regulator for inspection. If the body casing of the pump is cracked, as in the picture, or you find metallic debris on the fuel pressure regulator screen (pictured right) this is indicative of a pump failure.
What happens when a CP4 fails on a Duramax?
The result of a CP4 failure in 6.6L LML GM Duramax is just as costly as in a 6.7L Power Stroke because the metal debris floods the entire high-pressure fuel system from fuel lines, fuel rails, pump and injectors, necessitating replacement of all of those components and the removal/flushing of the fuel tank.