It is rarely ever enjoyable to listen to an injector noise on your Audi S3. It is a noise that comes up frequently, usually when you accelerate or your engine is idling. However, this symptom may be linked to different types of trouble with your vehicle injectors. It may not be anything serious, but when a persistent noise shows up, you have to be sure. Especially since replacing your Audi S3’s injectors can be costly. That’s why our team decided to prepare this content in order to help you see more clearly, learn about the different possible failures and determine your trouble. To do this, we will first look at the normal running and usefulness of the injectors in your Audi S3, then at the possible triggers from which an injector noise may come.
Purposes of the injectors
Injectors are a very fundamental element of the operation of your engine motor. They were introduced to the modern cars about 20 years ago. Before their appearance, 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 get the best possible combustion in the cylinders.
The different triggers of a clicking or knocking noise caused by the injectors of your Audi S3
Hearing injector noises on your Audi S3 may come from different sources, we will now concentrate on the potential causes of these. In general, the typical 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 get rid of them. If you listen to another clicking noise but it is not from your injectors, we suggest you to go through this content about clicking noise on Audi S3 to find the reason.
The reasons for injector clicking or knocking noise Audi S3
A clicking or knocking noise from your injectors can be explained for different reasons. Indeed, the injectors of your Audi S3 have three main missions, to control the vaporisation of the fuel, i.e., to convert the liquid into “gas” during injection, to ease its combustion. Then, its goal is to deal with the air/fuel dosage and at last the homogeneity of the mixture, always with the goal of improving combustion. If one of these three tasks is altered, the main functionality of the injectors will be disrupted and this will lead to poor combustion. This bad combustion will be a violent explosion in the cylinders as a consequence of bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will induce thoses knocking or clicking noises on your Audi S3. The main reason of these concerns in most cases comes from a particle that gets into the injectors. The accuracy of the injector being in the nanometer range, any possible blockage will inevitably end up in a malfunction of the injector. If after verifying, this noise comes from another element of the engine of your Audi S3, have a look at this content for more infos.
The consequences of injector noise on Audi S3
Now that we have analyzed the different reasons for injector noise on your Audi S3, we will end by stating the possible side effects of malfunctioning one or more of your injectors. Whether only one is obstructed, or broken, or your entire fuel rail is involved, you cannot escape these effects which can fairly quickly 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 common consequences experienced 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 fairly quickly affect your cylinders or pistons and your engine may tighten.
Here are three little tips to limit the risks connected 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>
