Diesel injector pump failure is primarily caused by fuel contamination (dirt, water, debris) acting like sandpaper, which wears down microscopic components, and lack of lubrication from running the tank too low, causing overheating and component damage. Other major factors include neglecting timely fuel filter changes, air intrusion, incorrect installation, and extreme operating conditions, all leading to premature wear, seizure, or sealing surface damage within the high-precision parts.
Fuel injectors will fail when debris (water, dirt particles, etc.) or rust find their way into the system and, after time, plug up the nozzle, the armature, or the nozzle needle gets stuck. Left too long, a faulty fuel injector can cause serious engine damage that requires major repair.
6 Common Causes of Diesel Pump Failure (And How to Prevent Them)
Common Causes of Diesel Fuel Injector Failure
4 Causes of Diesel Fuel Injection Pump Failure
A well-maintained diesel injection pump typically lasts between 100,000 and 150,000 miles, but its lifespan depends heavily on factors such as fuel quality, regular filter changes, and operating conditions.
The lifespan of a diesel fuel injector
The life expectancy of a good quality diesel fuel injector is around 150,000 kilometres. They should be checked out by a professional at around this time.
Change Your Fuel Filters
Replacing your fuel filters regularly will also increase the efficiency of your injector. Filters work to prevent dirt and particles from entering the fuel system, so it is vital to keep them in good condition by replacing them, as an old fuel filter loses its efficiency over time.
While fuel injector problems usually give warning, driving your vehicle for a long time with a clogged or faulty fuel injector can cause problems. At Rislone, we always advise customers to closely monitor how their engine is performing as a guide to determine if something might be wrong with their fuel system.
Ejector pumps handle waste and water from lower-level spaces, but debris, grime, and buildup can clog the pump and reduce its effectiveness. Without proper maintenance, ejector pumps are at risk of failure, which can lead to unpleasant and costly backups.
How Do You Test a Diesel Injector Pump?
Leaking Mechanical Seal
This is one of the most common early pump failures, and it can happen upon installation or startup or shortly after the pump runs for a few hours. Here are some ways to better understand why and how this happens: The seal was run dry.
Spray penetrating oil like WD-40 or PB B'laster on the injection pump. You might need to let it soak overnight so you can continue unsticking a stuck injection pump. Gently tap the pump if necessary to help free it up.
This is a one-stop symptom checker for issues related to common rail injectors and CP3 pumps.
The average cost for a Diesel Injection Pump Replacement is between $1,984 and $2,863. Labor costs are estimated between $643 and $943 while parts are priced between $1,342 and $1,919. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
A common fault is from contamination or by general wear and tear, as the nozzle can become blocked with carbon or foreign matter. This is a common problem if alternative fuel has been used. Once the diesel injectors nozzle becomes blocked no fuel passes through to the combustion chamber within the engine.
It works through fuel injectors and carburetors to remove harmful residues and deposits from fuel passageways, intake valves, pistons, and chamber areas. Made from petroleum ingredients, Sea Foam is safe and effective when used in all types of gasoline or diesel fuels and fuel blends.
A dirty fuel injector can affect your car's performance, but it doesn't always need to be replaced. Sometimes a good cleaning can solve any issues, at least temporarily.
The worst things for a diesel engine involve neglecting maintenance (especially oil/filters), using poor fuel quality, allowing low fuel levels, overloading/lugging the engine, and not letting it warm up/cool down properly, all leading to contamination, excessive wear, turbo damage, and injector/pump failure due to high pressures and sensitive components. Contaminated fuel (water, dirt, high sulfur) is especially damaging, corroding parts and clogging filters in these high-pressure systems.
Replacing fuel injectors is a detailed task, but with the right approach, you can handle it. If you're confident with tools and automotive work, follow this step-by-step guide to get the job done. While the cost of replacing fuel injectors can vary, doing it yourself can save you money.
It injects fuel into the intake manifold in the vehicle so the engine can generate power. If the pump fails to inject fuel, the engine won't start. These components are designed to last for at least 100,000 miles or more, but they can encounter problems along the way.
For a static test, turn the car on and start the ignition. If you can't start the vehicle's engine, you can crank it for five seconds. Then, you can leave the car and check the readings on the low-pressure gauge. As for the dynamic test, you should start the engine again and then leave it idle.
As a rough guide the average lifespan of a diesel engine can vary from 5,000 hours to 20,000 hours, assuming it's maintained properly. In terms of mileage, that equates to 300,000 miles to 100,000 miles. Properly maintained, under standard working conditions, a diesel engine can last a long, long time!
Whilst these issues can be caused by a different source, or be solved by simply cleaning your injectors, it is worth diagnosing that the problem isn't more extensive. A fuel injector that isn't replaced when it needs to be can ultimately cause damage to other parts of your heavy equipment.