It is never pleasant to listen an injector noise on your Mercedes Classe A 4. It is a noise that arises repeatedly, usually when you accelerate or your engine is idling. However, this sign may be related to several sort of problems with your vehicle injectors. It may not be anything severe, but when a recurrent noise shows up, you have to be sure. Specifically since fixing your Mercedes Classe A 4’s injectors can be expensive. That’s why our team decided to prepare this article content in order to help you see more clearly, learn about the different conceivable failures and establish your problem. To do this, we will first look at the normal running and usefulness of the injectors in your Mercedes Classe A 4, then at the conceivable reasons from which an injector noise may come.
Attributes of the injectors
Injectors are a very fundamental component of the operation of your engine motor. They were brought in to the modern automobiles about 20 years ago. Before their appearance, more conventional carburettor-type intake systems were used, 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 accurately (quantity of fuel injected, air/fuel mixture) via the analysis of the data obtained 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 get the best possible combustion in the cylinders.
The different causes of a clicking or knocking noise caused by the injectors of your Mercedes Classe A 4
Experiencing injector noises on your Mercedes Classe A 4 may result from different sources, we will now focus on the potential causes of these. In most cases, the usual noise of a faulty injector is of the snap type. Here are the different sources of these noises and the solutions to be adopted to get rid of them. If you listen 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 A 4 to locate the trigger.
The reasons for injector clicking or knocking noise Mercedes Classe A 4
A clicking or knocking noise from your injectors can be explained for different reasons. In fact, the injectors of your Mercedes Classe A 4 have three main missions, to manage the vaporisation of the fuel, i.e., to convert the liquid into “gas” during injection, to ease its combustion. Then, its task is to deal with 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 modified, the main purpose of the injectors will be disrupted and this will lead to poor combustion. This bad combustion will be a violent explosion in the cylinders due to 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 A 4. The main trigger of these situations generally 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 checking, this noise originates from another element of the engine of your Mercedes Classe A 4, browse this article content for more infos.
The effects of injector noise on Mercedes Classe A 4
Now that we have reviewed the different causes for injector noise on your Mercedes Classe A 4, we will end by stating the possible effects 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 critical….
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 regular repercussions felt 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 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 associated with 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>
