Diagnostic Methods for Diesel Engine Injectors Part 1

The advantage of electronic diesel engines is that technicians can connect a scanning tool to analyze data in an attempt to identify issues, but some issues may be more challenging than your customers or what you imagine.

A common sentence that customers often use is "This is a diesel engine, and this problem should be easy to diagnose." Of course, there are some common repairs that are easy to perform on specific diesel engines, but this does not mean that everything else is easy to diagnose. Users often believe that because diesel engines are now computer-controlled, technicians should be able to connect a scanning tool and immediately see what is happening. The advantage of electronic diesel engines is that technicians can connect a scanning tool to analyze data in an attempt to identify issues, but some issues may be more challenging than your customers or what you imagine. The diagnostic methods for diesel engine fuel injector problems are as follows:

Like anything else, over time, the injector becomes fatigued and weak.

Even if they are electronic, sometimes the mechanical components inside the injector may wear out, stop working properly, and even malfunction.

In this case, the fault diagnosis instrument usually identifies the cylinder with the contributing problem.

However, apart from wear or fatigue, fuel injectors may malfunction. One of the most common faults is the rupture of the fuel injector body. When the car body cracks, the engine may not necessarily trip, but it can cause other problems, which may be more difficult to determine.

Although the fuel injector body may rupture, the engine may still run well and may only take a longer time to start.

In addition, customers may notice an increase in the oil level on the dipstick and notice some fuel dilution in the oil. When the engine is turned off, cracks on the fuel injector body usually cause fuel to be discharged back into the tank from the fuel lines and rails. When a leak occurs, the engine must rotate excessively for a period of time in order to refill the injection system.

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