It is hardly ever relaxing to hear an injector noise on your Mercedes A class. It is a noise that happens frequently, usually when you accelerate or your engine is idling. However, this indicator may be connected to different kind of concerns with your vehicle injectors. It may not be anything serious, but when a persistent noise appears, you have to be sure. Especially since repairing your Mercedes A class’s injectors can be expensive. That’s why our team chose to compose this article in order to help you see more clearly, learn about the different plausible failures and identify your trouble. To do this, we will first look at the normal running and usefulness of the injectors in your Mercedes A class, then at the plausible reasons from which an injector noise may come.
Attributes of the injectors
Injectors are a very significant element of the operation of your engine motor. They were introduced to the modern vehicles about 20 years ago. Before their arrival, 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 opportunity, 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 compiled from the various sensors equipping the vehicle (engine temperature, acceleration level, engine speed, etc.). Their goal is therefore to inject under high pressure a precise quantity of an air/fuel mixture at a perfect timing to get the best possible combustion in the cylinders.
The different triggers of a clicking or knocking noise coming from the injectors of your Mercedes A class
Hearing injector noises on your Mercedes A class may come from different locations, we will now focus on the potential triggers of these. In general, the common noise of a faulty injector is of the snap type. Here are the different sources of these noises and the solutions to be put into practice to stop them. If you hear another clicking noise but it is not from your injectors, we advise you to browse this article about clicking noise on Mercedes A class to find the cause.
The reasons for injector clicking or knocking noise Mercedes A class
A clicking or knocking noise from your injectors can be explained for different reasons. In fact, the injectors of your Mercedes A class have three main tasks, to manage the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to facilitate its combustion. Then, its objective 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 attributes is modified, the main role of the injectors will be disrupted and this will lead to poor combustion. This bad combustion will be a violent explosion in the cylinders because of bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will provoke thoses knocking or clicking noises on your Mercedes A class. The main cause of these concerns usually originates from a particle that gets into the injectors. The precision of the injector being in the nanometer range, any possible obstruction will inevitably produce a malfunction of the injector. If after verifying, this noise originates from another element of the engine of your Mercedes A class, have a look at this article for more informations.
The consequences of injector noise on Mercedes A class
Now that we have reviewed the diverse reasons for injector noise on your Mercedes A class, we will end by stating the possible end result of malfunctioning one or more of your injectors. Whether only one is clogged, or damaged, or your entire fuel rail is involved, you cannot escape these repercussions which can promptly become considerable….
First, you risk destroying your exhaust unit 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 common consequences felt by drivers is a significant loss of power. In fact, if your engine is running on 3 out of 4 cylinders for example, you will obviously have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will promptly damage your cylinders or pistons and your engine may tighten.
Here are three little recommendations to limit the risks relating 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>
