How to Avoid Injector Problems in a Common Rail System

27 October 2020
 Categories: , Blog

Electronically controlled fuel injection is by far the most efficient way of running an engine and can create extremely high levels of pressure for better drivability. Yet the parts involved are highly sensitive to disruption and work with very precise clearance, so they need to be serviced or replaced at the first sign of trouble. What can go wrong with these common rail injectors, and how will you know that you have an issue?

Avoiding Issues

While the parts in a common rail injector system can significantly reduce emissions and make your vehicle far more efficient, you will need to ensure that they are protected from contamination. This problem comes in many shapes and forms, and often, the best way to avoid any developing issue is to inspect and clean them as often as once per month.

Focusing on the Problem

Fuel is forced through microscopic holes in each injector under great pressure. You need to ensure that those holes are always free and clear and check for deposit or contamination at either end.

Contamination Issues

Try to buy your fuel from a reliable and professional source. Water can sometimes get into fuel storage facilities and, even in small quantities, can cause harm. Any amount of moisture has the capacity to corrode metallic surfaces and can cause premature wear to the injectors and the pumping system.

Interior Deposits

Tiny particles can get in between the functioning parts of a control valve. When this happens, the individual parts may not interact correctly, and there may be a poor seal when the valve closes. This can affect the timing of the injection process and the amount of fuel that gets into the combustion chamber.

Exterior Deposits

When this happens, some of the fuel may be left within the chamber following detonation. It will quickly burn and could form carbon deposits on the inside of the chamber. These deposits may accumulate around the tip of the injector, and this could also disrupt timing and fuel quantity.

Signs of a Problem

When problems arise, you may hear and feel the consequences. If the fuel is not burning properly, then you will certainly notice the premature detonation. It may sometimes sound like a knocking noise, and the engine may sound particularly rough.

If too much fuel is getting into the cylinder, then the engine may surge forward when you lay off the throttle. This can be a troubling and scary development and may be caused by faulty injectors.

Repair or Replace

It may be possible to clean the injectors if they are not too badly contaminated, but remember that they are very sensitive pieces of equipment. If you do need to replace them, therefore, always ensure that you buy the highest-quality components you can find. 

Contact a supplier of common rail injectors to learn more.