It is hardly ever pleasant to hear an injector noise on your Mercedes Classe M. It is a noise that appears frequently, usually when you accelerate or your engine is idling. However, this indicator may be connected to several types of trouble with your vehicle injectors. It may not be anything severe, but when a repeated noise shows up, you have to be sure. Most importantly since repairing your Mercedes Classe M’s injectors can be expensive. That’s why our team chose to prepare this article content in order to support you see more clearly, learn about the different possible failures and determine your trouble. To do this, we will first look at the normal functioning and usefulness of the injectors in your Mercedes Classe M, then at the possible causes from which an injector noise may come.
Functions of the injectors
Injectors are a very vital part of the operation of your engine. They were released to the modern vehicles about 20 years ago. Before their introduction, more conventional carburettor-type intake systems were employed, which handled the intake of air and fuel into the engine cylinders. With the injectors, manufacturers now have the ability, thanks to the injectors pump, to control electronically each stage of the intake process very precisely (quantity of fuel injected, air/fuel mixture) via the analysis of the data accumulated from the various sensors equipping the vehicle (engine temperature, acceleration level, engine speed, etc.). Their purpose is therefore to inject under high pressure a precise quantity of an air/fuel mixture at a perfect timing to obtain the best possible combustion in the cylinders.
The different reasons of a clicking or knocking noise caused by the injectors of your Mercedes Classe M
Discovering injector noises on your Mercedes Classe M may originate from different sources, we will now concentrate on the potential causes of these. In most cases, the common noise of a faulty injector is of the snap type. Here are the different origins of these noises and the solutions to be used to prevent them. If you hear another clicking noise but it is not from your injectors, we recommend you to go through this article content about clicking noise on Mercedes Classe M to find the trigger.
The causes for injector clicking or knocking noise Mercedes Classe M
A clicking or knocking noise from your injectors can be explained for different causes. In fact, the injectors of your Mercedes Classe M have three main missions, to manage the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to ease its combustion. Then, its task is to control the air/fuel dosage and finally the homogeneity of the mixture, always with the aim of improving combustion. If one of these three features is altered, the main functionality of the injectors will be disturbed and this will lead to poor combustion. This bad combustion will be a violent explosion in the cylinders resulting from bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will provoke thoses knocking or clicking noises on your Mercedes Classe M. The main trigger of these concerns commonly comes from a particle that gets into the injectors. The precision of the injector being in the nanometer range, any possible blockage will inevitably lead to a malfunction of the injector. If after checking, this noise comes from another component of the engine of your Mercedes Classe M, check this article content for more infos.
The consequences of injector noise on Mercedes Classe M
Now that we have examined the several reasons for injector noise on your Mercedes Classe M, we will end by stating the possible consequences of malfunctioning one or more of your injectors. Whether only one is blocked, or broken, or your entire fuel rail is involved, you cannot escape these consequences which can almost instantly become severe….
First, you risk destroying your exhaust system in the long run, because the unburned fuel residues that will end up in your exhaust system can corrode the metal in it.
One of the most known effects noticed by drivers is a noticeable loss of power. In fact, if your engine is running on 3 out of 4 cylinders for example, you will undoubtedly have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will almost instantly harm your cylinders or pistons and your engine may tighten.
Here are three little tips to limit the risks linked to your injectors and protect you from engine failure:
- Do not drive at the bottom of the tank, as you may absorb impurities
- Use quality fuel
- Think of swapping your diesel fuel filter regularly>
