Duramax Injectors can sometimes need to be replaced. This is often related to poor quality fuel which causes premature injector failure within the engine. This is a dreaded repair process for many truck owners due to the cost associated with this job. The total cost for Duramax injector replacement is $2,000 and $6,000.
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What are common problems with Duramax Diesel?
Most Common Problems With 3.0 Duramax:
- Long Crank Start-up Time. If your 3.0 Duramax engine takes a long time to crank up, then it may have an issue with the glow plugs or glow plug wiring ...
- Injector Failure. ...
- Turbocharger Failure. ...
- EGR Valve Failure or Stuck Open. ...
- Worn Out Oil Pump Belt. ...
What are the problems with the Duramax?
The 5 Most Common LB7 Duramax Engine Problems
- Fuel Injector Failure
- Water Pump Failure
- Fuel Filter Housing O-ring Leaks
- Blown Head Gasket
- Overheating (fan clutch problems, radiator gunk)
What is the problem with Duramax Chevy diesels?
The Duramax diesel is susceptible to fuel starvation and getting air in the fuel lines. This can be contributed to the fuel filter housing design and the fact that the Duramax does not use a lift pump. Rather, the high pressure fuel pump (injection pump) is responsible for vacuuming fuel from the tank.
How to change fuel filter on Duramax Diesel?
What Do I Need To Know Before Buying?
- Manufacturers. Despite the fact that we usually advise you not to only trust a company’s name or appearance value when purchasing a product, we’ll make an exception for Ford.
- Cost. ...
- Filtration Subtlety. ...
- Purification Degree. ...
- Construction. ...
How much does it cost to replace a CP3 pump on a Duramax?
2-to-CP3 conversion is about $3,500 for parts and labor. That might take the breath away from many Duramax owners, but compared to the $8,000-plus it costs should the CP4. 2 fail, it's a bargain.
How much does it cost to replace a diesel fuel pump?
It will cost you about $500-$1200 to replace a fuel pump in your truck. You will spend about $200-$300 on labor and parts will be about $400-$800.
How long does a Duramax fuel pump last?
100,000 milesOn average, a vehicle's water pump should last well over 100,000 miles. Unfortunately, those who drive Duramax 6.6-liter engines usually have to replace theirs by 80,000 miles. In some cases, the pump will last to 100,000 miles, but it usually fails much earlier than an average water pump does.
What year Duramax have fuel pump problems?
According to InjectorsDirect.com, the 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year-range model. Failure of this CP4 pump is usually catastrophic, causing metal particulates to contaminate the entire fuel system.
How much should a fuel pump cost including labor?
The average cost for a fuel pump replacement is between $220 and $1,062, depending on vehicle and age. Labor costs are estimated between $124 and $260, while parts are priced between $95 and $854. Estimates do not include taxes and fees.
What are the signs your fuel pump is going out?
Seven Signs Your Fuel Pump Is Going OutSputtering Engine. Your fuel pump is telling you something if your engine starts to sputter once you've hit the top speed on the highway. ... Overheating Engine. ... Low Fuel Pressure. ... Power Loss. ... Surging Engine. ... Gas Mileage Decrease. ... Dead Engine.
How do I know if my Duramax fuel pump is bad?
The GMC Duramax is a turbo-diesel engine produced by General Motors for pickup trucks, SUVs, and vans....Signs of a Defective Injection PumpDifficulty accelerating: The engine requires fuel to function optimally. ... Reduced fuel efficiency: Another indication of a defective fuel pump is a reduction in fuel efficiency.More items...•
How common is CP4 failure Duramax?
Registered. I have read that as much as 7% of CP4 fail on LML Duramax.
How many fuel pumps does a Duramax have?
On a stock Duramax there is no electric pump in the tank or on the rail -- unless you have dual tanks. The Bosch CP3, mechanical pump mounted in the engine valley, pulls the fuel from the tank via vacuum. Maine Towing - faster on the draw than me! Member #28 of the OiO association.
How long will a CP4 pump last?
around 100,000 milesAir in the pump means that metal rubs against metal, causing accelerated wear. This will eventually cause the CP4 to fail, often around 100,000 miles. Before it fails, metal shavings are produced by the CP4, which travel into the fuel injectors and the fuel lines with catastrophic results.
What causes diesel fuel pump failure?
Two of the most common causes of diesel fuel pump failure are consistently low gasoline and engine breakdowns.
How do I know if my CP4 is bad Duramax?
5:077:42How to Diagnose if your CP4 Fuel Pump is Failing - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd we'll show you the steps along the way to go down and check that we'll start by pulling theMoreAnd we'll show you the steps along the way to go down and check that we'll start by pulling the lower filter and checking for any debris or metal shavings that may be.
How much does it cost to replace a fuel pump?
If you decide to go with a professional, you may be looking at a cost of between $400 and $600 to replace a bad fuel pump. You can search through our Preferred Shops in your area for a mechanic that can help with the fuel pump repair.
How long does a fuel pump prime cycle last?
Most cars have a prime cycle that the fuel pump will go through when the key is turned to on, but not start. This prime lasts usually about 3-5 seconds where you will hear the pump turn on in the tank. If you don’t hear this at the tank and have before while the car was operating properly, the fuel pump is suspect.
How do carburetor pumps work?
They worked by pulling fuel from the tank with suction, and pressurizing it on its way to the carburetor.
What does it mean when a fuel pump is weak?
A weak fuel pump is one that will often not hold sufficient pressure for the fuel injection system to operate properly. In many cases, it can start the vehicle, but acceleration can be a problem with hesitation, lack of power, or stalling. In any of these cases, a running and/or static fuel pressure test can help determine if the fuel pump is ...
What happens if your fuel gauge is not working?
In modern vehicle fuel pumps, the pump assembly usually contains the fuel-level sending unit as well, so if your fuel gauge is not properly working, you can often trace it to a fuel pump assembly unit not functioning properly. In both cases, changing the fuel pump can rectify the issue.
What to do if you hear a loud noise in your fuel pump?
The first thing you should do if you hear this noise is ensure that you are not running below empty. A second consequence of a bad fuel pump is that your car might have a difficult time starting. One of the fuel pump’s primary jobs is to keep a level of static pressure within the fuel system.
What is the purpose of a fuel pump?
The fuel pump is responsible for moving fuel from the vehicle’s fuel tank to the engine with sufficient pressure. From there, depending on your vehicle, different things can happen.
What is the problem with the 2011 Duramax fuel pump?
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. Below we will discuss the reasons for this failure, how to diagnose a pump failure, and show you the parts you need to properly fix your vehicle.
Why does my LML pump fail?
The LML and LGH CP4 pumps most commonly fail due to this lack of lubrication which causes internal metal parts (the drive cam, cam follower or pump piston, as well as the housing itself) to rub against each other and begin to shave off small metal particles.
What is a CP4 pump?
The CP4 injection pump creates higher pressures with less volume than its predecessor, the CP3 pump. Although this makes it a more efficient pump, the lack of volume creates a lack of lubrication since these pumps rely on the diesel fuel to act as a lubricant.
Can you use diesel fuel additive in CP4?
Using a commercially available diesel fuel additive can be helpful, but cannot be guaranteed to prevent CP4 pump failure.
Can you use lubricant additives on a pump?
Using lubricity additives doesn’t guarantee that your pump won’t fail someday, so it’s important to know what steps to take when it happens to you.
Can a CP4 pump be repaired?
InjectorsDirect.com has put together complete repair solution for LML/LGH CP4 Pump failure using all OEM parts (pictured below.) Simply flushing the fuel system is inadequate, and could lead to residual contaminants in your fuel system. Contamination is the number one cause of repeat injector failure, and replacing all of the fuel system components is the only way to prevent recurring contamination issues.
How often do fuel pumps need to be replaced?
Fuel pumps do not have a specific replacement interval. Replacement becomes more common as the mileage on the car increases. Repeatedly running the fuel tank low or driving with clogged fuel filters can put additional strain on the fuel pump, shortening its lifespan.
How does the fuel pump work?
Fuel pumps on most cars and trucks use an electric motor to drive a fluid pump. The pump can be either inside or outside the fuel tank. Either way, the fuel is sucked out of the fuel tank and pushed through a line to a filter, and then to the fuel injectors.
What are the symptoms related to a bad fuel pump?
A failing fuel pump will not create enough pressure in the fuel system, possibly causing a loss of engine power or preventing the car from starting. It may also cause the check engine light to come on.
What is the job of a fuel pump?
The fuel pump's main responsibility is to deliver gas from the fuel tank to the fuel injectors. The pump must deliver the right amount of fuel and at a high enough pressure to keep the engine running smoothly in all conditions.
Can I drive with a fuel pump problem?
Driving with a failing fuel pump is a bad idea. In some cases, the car won't even start or run, preventing you from driving at all.
Is CP3 pump conversion illegal?
I read the CP3 pump conversion is illegal in California, so apparently not an option.
Can injectors be damaged?
Note:The injectors are typically damaged as well if the pump is damaged.
Do you need injectors for a CP4?
If your CP4 grenades then yes you typically need injectors also as the fine metal shavings are spread throughout the system. Ford 6.7 Powerstroke is the same way. If your truck came to my shop with this condition that is what I would recommend. It's not worth the risk to have an injector hang open and burn a hole in a piston.
How much does it cost to replace a Duramax water pump?
The average Duramax Water Pump replacement will cost you $950. The labor costs are$400 to $500 and the parts will be priced at $400 or so. This might not include taxes, fees, and other charges that can be added by your dealership or mechanic of choice. There may also be additional repairs that are needed beyond this general replacement process.
What is the Water Pump in Your Duramax?
The water pump circulates coolant throughout your truck’s engine. This is an essential part of the cooling system that allows your car to run without overheating. The water pump is controlled by an accessory belt that is located at the front of the engine. This belt can also be located near the timing belt or timing chain in some models of vehicles.
What are the Signs of a Water Pump Failure?
If you are not sure if your water pump is the reason for your engine having issues, there are some clear signs that this is the reason for your engine having issues. These signs can be related to other things that are wrong with your vehicle, but they are often clearly related to your water pump failing.
Why does my water pump have holes?
If you can visibly see holes in the water pump, this is a sign that something has caused damage to this part and made it lose water to leaks and pressure over time. This damage can be related to the deicer and other environmental conditions that have damaged this part of the engine and made the water pump fail. You might need to diagnose other damage if you see this kind of issue with your water pump.
What does it mean when your water pump is rusting?
Rust is a sign that your water pump needs to be replaced as soon as possible.
How long does it take to replace a water pump?
In some cases, it will take 8-12 hours to complete this replacement process, which can lead to increased labor fees that will go beyond the amount quoted in your estimate. There are many reasons for this to be the case, but the location of the water pump is the primary reason that labor can head into the $500 range or more. You should always be prepared to pay more for labor than expected when this part needs to be replaced.
Do you have to be prepared for engine repair?
At the end of the day, preparation is invaluable for this kind of process and you will save yourself heartache by looking into all of the details of the repair before you embark on it and find out that you do not have all of the items that you need. Always remember that you should never exceed your comfort with working on engine repairs when you are considering working on this large of a task.