It is hardly ever relaxing to experience an injector noise on your Audi A8. It is a noise that happens repeatedly, usually when you accelerate or your engine is idling. However, this indication may be relating to several types of complications with your automobile injectors. It may not be anything major, but when a repeated noise appears, you have to be sure. Most importantly since replacing your Audi A8’s injectors can be costly. That’s why our team decided to prepare this article content in order to help you see more clearly, learn about the different plausible failures and determine your problem. To do this, we will first look at the normal functioning and usefulness of the injectors in your Audi A8, then at the plausible reasons from which an injector noise may come.
Attributes of the injectors
Injectors are a very fundamental element of the operation of your engine. They were introduced to the modern cars 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 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 compiled from the various sensors equipping the automobile (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 origins of a clicking or knocking noise caused by the injectors of your Audi A8
Hearing injector noises on your Audi A8 may come from different sources, we will now concentrate on the potential triggers of these. In most cases, the typical 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 prevent them. If you experience another clicking noise but it is not from your injectors, we suggest you to go through this article content about clicking noise on Audi A8 to locate the reason.
The causes for injector clicking or knocking noise Audi A8
A clicking or knocking noise from your injectors can be justified by different causes. Indeed, the injectors of your Audi A8 have three main missions, to manage the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to facilitate its combustion. Then, its goal is to manage the air/fuel dosage and finally the homogeneity of the mixture, always with the objective of improving combustion. If one of these three characteristics 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 Audi A8. The main reason of these problems in most cases originates from a particle that gets into the injectors. The precision of the injector being in the nanometer range, any possible obstruction will inevitably result in a malfunction of the injector. If after checking, this noise originates from another part of the engine of your Audi A8, check this article content for more informations.
The end result of injector noise on Audi A8
Now that we have analyzed the several causes for injector noise on your Audi A8, we will end by stating the possible side effects 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 quickly become major….
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 noticed by drivers is a noticeable loss of power. Indeed, if your engine is running on 3 out of 4 cylinders for example, you will undoubtedly have a loss of power
Finally, you risk degrading 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 suggestions to limit the risks connected 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 swapping your diesel fuel filter regularly>
