What fuel pump is in 2011 Duramax?

what fuel pump is in 2011

What fuel pump is in 2011 Duramax?

FASS Titanium Signature Series Diesel Fuel Lift Pump 100GPH GM Duramax 6.6L 2011-2014 (TS C11 100G)

Part NumberTS C11 100G
Vehicle 2011 – 2014 Chevy
Application Stock to Moderate HP (0-600 HP)

This one is specific to the LML code Duramax produced between ’11-’16, which used the Bosch CP4.2 high-pressure fuel pump (vs. the predecessor CP3 found on LB7, LLY, LBZ and LMM engines). Unlike the ultra-durable CP3 that came before it, the CP4.2 doesn’t possess the same track-record for reliability.

What fuel pump does Duramax use?

The GMC and Chevy Duramax pick-up trucks do NOT have a lift pump to supply fuel to the engine. From the factory, the CP3 injection pump is the truck’s only means of getting fuel from the tank to the engine.

Does a 2011 Duramax have a CP4?

The 2011-2016 LML Duramax is notorious for this issue. These trucks are outfitted with Bosch CP4 high-pressure injection pumps, which have the tendency to fail once they’re exposed to diesel fuel. Failure of the high-pressure fuel pump is catastrophic.

What fuel pump is in the LML Duramax?

The alternative for performance-upgraded 6.6 Duramax LML engines is converting to a venerable CP3 (left) high-pressure fuel pump such as Fleece Performance Engineering’s PowerFlo 750.

What fuel pump is in the LML Duramax?

The alternative for performance-upgraded 6.6 Duramax LML engines is converting to a venerable CP3 (left) high-pressure fuel pump such as Fleece Performance Engineering’s PowerFlo 750.

What year Duramax has the CP3 pump?

The fix is to do a CP3 transplant. The CP3 was a stalwart performer in 6.6-liter Duramax diesels from , and it’s been the heart of Cummins 5.9-liter and 6.7-liter engines since 2003.

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 common is CP4 failure LML?

I have read that as much as 7% of CP4 fail on LML Duramax.

How can you tell the difference between CP3 and CP4?

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.

Which Duramax has CP4?

The CP4. 2 is used in GM 6.6L Duramax LML, Ford 6.7L Power Stroke, and 2019-to-present 6.7L Cummins powerplants.

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.

What does CP3 stand for Duramax?

CP3 = Common rail high pressure 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.

Does a LML have a lift pump?

The LML Duramax doesn’t have a factory lift pump. Luckily, the addition of an aftermarket electric lift pump can help ensure that positive pressure (and no air) is supplied to the low-pressure side of the CP4. 2—and can be installed relatively affordably.

What does LML mean on a 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 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.

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.

How do you know if your 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 is a CP4 2?

The CP4. 2 (left) is a twin-piston pump while the CP3 (right) utilizes three, but thanks to its dual-lobe cam the pistons in the CP4. 2 perform twice the work. Although the CP4. 2 moves less fuel volume than the CP3 (roughly 20-percent less according to the output of LML Duramax CP4.

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.

What kind of fuel pump does a Duramax have?

The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Chances are, if you’re looking at this page, you’re well aware of the problem.

When did the GM Duramax fuel pump get a lawsuit?

When GM installed that pump in the 6.6-liter Duramax engine used from the 2011 to 2016 model years, the lawsuit claims the thinner U.S. fuel didn’t provide enough lubrication, allowing air pockets to form in the fuel pump.

What is the GM diesel truck fuel pump defect?

What is the GM Diesel Truck Fuel Pump Defect? The GM diesel truck fuel pump defect is reportedly due to an incompatibility between the CP4 fuel injection pump and the Duramax engines installed in these vehicles, as well as an incompatibility between the pumps and American fuel.

Can a Duramax run on biodiesel?

So, by relying on an external fuel source for a DPF re-gen, the LML kept its oil free of any fuel dilution. Speaking of fuel, the LML was the first Duramax to be able to run on a B20 blend of biodiesel.