It is rarely ever enjoyable to listen an injector noise on your Mercedes Classe A. It is a noise that appears repeatedly, usually when you accelerate or your engine is idling. However, this symptom may be relating to several types of complications with your vehicle injectors. It may not be anything serious, but when a repeated noise happens, you have to be sure. Especially since replacing your Mercedes Classe A’s injectors can be costly. That’s why our team chose to compose this content in order to support you see more clearly, learn about the different possible failures and distinguish your problem. To do this, we will first look at the normal running and usefulness of the injectors in your Mercedes Classe A, then at the possible reasons from which an injector noise may come.
Purposes of the injectors
Injectors are a very important part of the operation of your engine. They were introduced 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 possibility, 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 objective 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 coming from the injectors of your Mercedes Classe A
Finding out injector noises on your Mercedes Classe A may originate from different locations, we will now concentrate on the potential causes of these. In general, the usual noise of a faulty injector is of the snap type. Here are the several origins of these noises and the solutions to be used to stop them. If you listen another clicking noise but it is not from your injectors, we suggest you to read this content about clicking noise on Mercedes Classe A to discover the cause.
The causes for injector clicking or knocking noise Mercedes Classe A
A clicking or knocking noise from your injectors can be explained for different causes. Indeed, the injectors of your Mercedes Classe A 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 at last the homogeneity of the mixture, always with the goal 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 trigger thoses knocking or clicking noises on your Mercedes Classe A. The main cause of these concerns commonly comes from a particle that gets into the injectors. The accuracy of the injector being in the nanometer range, any possible obstruction will inevitably result in a malfunction of the injector. If after verifying, this noise comes from another element of the engine of your Mercedes Classe A, check this content for more infos.
The side effects of injector noise on Mercedes Classe A
Now that we have examined the diverse reasons for injector noise on your Mercedes Classe A, we will end by stating the possible consequences of malfunctioning one or more of your injectors. Whether only one is blocked, or damaged, or your entire fuel rail is involved, you cannot escape these repercussions which can quickly become severe….
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 effects noticed by drivers is a severe loss of power. Indeed, if your engine is running on 3 out of 4 cylinders for example, you will surely have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will quickly harm your cylinders or pistons and your engine may tighten.
Here are three little recommendations 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 changing your diesel fuel filter regularly>
