What is the difference between Bosch CP3&CP4 fuel pumps?

what is the difference between bosch cp3 cp4 fuel pumps

What is the difference between Bosch CP3&CP4 fuel pumps?

CP4.2 is a 2 piston dual cam fuel injection pump versus the CP3 is a 3 piston single cam injection pump. Basically the CP4 runs at a lot higher RPM’s with it being a dual cam versus single cam therefore more heat and a lower contamination tolerance.User Interaction Count: 5

How can you tell the difference between a CP3 and a CP4 fuel pump?

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.

What does CP3 pump stand for?

CP3 = Common rail high pressure pump.

How can you tell the difference between a CP3 and a CP4 fuel pump?

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.

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).

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.

Is there an updated CP4 pump?

Description. GM OEM Newly Updated Stock Replacement CP4 Pump. This is the New Updated CP4 from Bosch that Took Care of the Failures the Early Version Pumps.

Are all CP3 pumps the same?

All factory CP3s share the same displacement. However, due to slightly higher efficiency right out of the box, the Duramax pump will flow 195 to 200 lph on a flow bench, while a Cummins pump will put out 180 to 185 lph.

How does a Bosch CP3 pump work?

The injection pump uses electronics and a Fuel Control Actuator (FCA) to regulate this pressure and increase volume and pressure as requested. Since an engine will need less volume and pressure at idle than it would under a heavy wide-open throttle run, the pressure regulator is key to a proper functioning CP3.

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.

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.

Will a lift pump prevent CP4 failure?

Prevent CP4.

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.

Does the LMM have a CP3 or CP4?

The CP4 comes stock on the LML engines. All other models have a CP3, which so far has proven to be much more reliable. I dont think you can swap a CP4 into a LMM, LBZ, LLY, LB7, nor do i see why you would want to.

What fuel pump is on a 6.7 Powerstroke?

The Ford FC3Z-9A543-A CP4 Injection Pump is an OEM replacement for the 2015-2019 Ford 6.7L Powerstroke. This pump is also an upgrade for the 2011-2014 6.7L Powerstroke and flows 9% more fuel than the factory injection pump.

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 can you tell the difference between a CP3 and a CP4 fuel pump?

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.

What fuel pump is in the 2021 Ram 2500?

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.

What fuel pump does the L5P have?

Denso HP4 injection 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.

How much is a CP4 fuel pump?

Epic Fails

While supplying high-pressure fuel is an injection pump’s job, the CP4 does so with a high probability of failing (typically around the 100,000-mile mark) and leaving owners with a need to overhaul their truck’s entire fuel system, at a cost that can be anywhere between $8,000 and $10,000.

How much fuel pressure does a CP3 need?

If you are running a CP3 in a high-performance application, we highly recommend installing a fuel supply pressure gauge to ensure there is correct fuel pressure at all times. Recommended feed pressures for CP3 and CP4 equipped engines: Dodge/Cummins ’03 – ’16 (5.9L & 6.7L) no less than 8 PSI / no more than 15 PSI.

Are Bosch CP4 pumps any good?

The CP4 was Bosch’s updated model to the incredibly reliable and well-regarded CP3 pump. Unfortunately, the CP4 has long been plagued by failures, warranty claims, and expensive repair bills, even leading to a class-action lawsuit.

What kind of fuel pump does a Duramax have?

The Bosch CP4 pump is a high-pressure fuel pump, or injection pump, that debuted in 2011 in the Ford Powerstroke and GM Duramax engines. The CP4 was Bosch’s updated model to the incredibly reliable and well-regarded CP3 pump.

What causes a CP4 pump to fail?

There are many theories as to why the CP4 pumps fail, but it is typically associated with a lack of lubricity. This ultimately ends with metal shavings being released into the fuel system. One potential contributing factor is the ultra-low sulfur diesel (USLD) fuel available at the pump nowadays.

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.