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Common Rail Fuel Injector Issues for GM Duramax LB7

DFI is committed to providing the best quality remanufactured common rail fuel injectors possible. It doesn’t matter if you are from right here in Michigan or across the country, we got you covered. The GM Duramax LB7 engine is very durable. However, with enough mileage, there will come a time when the injectors need to be swapped out and replaced. That is where DFI comes in.
This post is dedicated to providing you with all the information required when it comes to remanufactured LB7 injectors for your Duramax diesel engine.

What Are Common Rail Fuel Injectors?

In the injector world, there are two main types. Common rail and unit injectors. The type used on the LB7 is known as a common rail fuel injector. This means that fuel is fed via a, appropriately named, fuel rail that provides universal and constant pressure to every injector.
Unit injectors, on the other hand, operate independently from one another. There is a “pump” attached to each unit which is activated by a camshaft. Of course, there are pros and cons to each system, but common rail fuel injectors tend to be more durable as they are simpler in design.

Common Problems

Common rail fuel injectors can fail in many ways. Several factors can such as fuel quality, operating conditions and improper installation can all play a role in why your common rail fuel injectors fail. Let’s have a look at some common rail fuel injector problems.

Poor Quality Fuel/Filtration

Where you buy your diesel fuel and how often the filter is replaced can have an impact on how long the injectors last. Symptoms such as excessive smoke, starting, and idling problems can all be an indicator that you are using poor-quality fuel in your truck.

Fuel Contamination

There are several ways that moisture can enter the fuel system. Most fuel tanks have a vent that allows excess pressure to be equalized. The downside is that air entering the tank oftentimes contains moisture especially if you live in the Tri-City area.
Once the moisture enters the system, it can do severe damage to the injectors. Unfortunately, corrosion is a silent killer and can significantly decrease the fuel injector lifespan. Reduced engine performance is one of the signs that there may be water in the fuel. Don’t take this matter lightly, as they can have a severe impact later down the road.

Using Non-OEM Parts

DFI only sells remanufactured injectors that meet or exceed OEM specs. Not all reman injectors are made the same, but we strive to be the best in the industry. We have over 40 years of real-world experience when it comes to rebuilding injectors.
Don’t get fooled by those “other guys” who claim to offer a great product with subpar results. Trust DFI when it comes to buying reman fuel injectors. We work with the latest equipment and employ some of the most knowledgeable staff around.

When Is It A Good Time To Replace Your Common Rail Fuel Injectors?

Fuel injectors aren’t a regular service item. Several factors can determine the lifespan of an injector. Their age, usage, and even fuel quality can all play a role in when the injectors will need to be replaced. If you use your truck every day, the smallest change in power, amount of smoke and soot being put out, and even hesitation will inform you that something is up. Preventative maintenance is key. At the first sign of trouble, have them inspected by a qualified professional. Even rebuilt or remanufactured injectors can be expensive. It doesn’t make any sense to get new ones until you are sure what the problem is.

The Difference Between Refurbished And Remanufactured Fuel Injectors

Rebuilt or remanufactured injectors are good if you just want peace of mind or if the original injectors weren’t the cause of your problems. In general, refurbished injectors are tested flow tested and have minor components such as O-rings replaced.
Remanufactured injectors, on the other hand, are completely disassembled and rebuilt to meet or exceed OEM specifications set out by the manufacturer. This means you get a product that functions as well as the original at a fraction of the cost.

Final Words

No matter if you are in the Tri-City area, Michigan, or anywhere in the country, we can help get your truck back up and running. Drop by our facility and see why we are some of the best in the business.
Can’t come in personally? No problem! We can mail your new injectors out to you. DFI will also include a pre-paid envelope so that you can send back the old ones to be used as cores.
Have anymore questions about remanufactured injectors for the Duramax LB7 Engine? Our ASE-certified staff would be more than happy to answer them. Call us at (855) 212-3063 or request a quote online today here!