It is never enjoyable to experience an injector noise on your Audi A7. It is a noise that comes up continually, usually when you accelerate or your engine is idling. However, this warning sign may be linked to multiple types of complications with your car injectors. It may not be anything severe, but when a recurrent noise happens, you have to be sure. Most importantly since replacing your Audi A7’s injectors can be expensive. That’s why our team decided to write this article 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 A7, then at the possible reasons from which an injector noise may come.
Benefits of the injectors
Injectors are a very vital component of the operation of your engine unit. They were introduced to the modern vehicles 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 precisely (quantity of fuel injected, air/fuel mixture) via the analysis of the data received from the various sensors equipping the car (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 Audi A7
Experiencing injector noises on your Audi A7 may originate from different origins, we will now focus on the potential triggers of these. Generally, the common noise of a faulty injector is of the snap type. Here are the several sources of these noises and the solutions to be implemented to prevent them. If you experience another clicking noise but it is not from your injectors, we recommend you to go through this article content about clicking noise on Audi A7 to find the cause.
The causes for injector clicking or knocking noise Audi A7
A clicking or knocking noise from your injectors can be explained for different causes. Indeed, the injectors of your Audi A7 have three main tasks, to control the vaporisation of the fuel, i.e., to convert the liquid into “gas” during injection, to ease its combustion. Then, its task is to manage the air/fuel dosage and at last the homogeneity of the mixture, always with the aim of improving combustion. If one of these three functions is modified, the main purpose of the injectors will be disturbed 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 provoke thoses knocking or clicking noises on your Audi A7. The main cause of these problems generally originates from a particle that gets into the injectors. The accuracy of the injector being in the nanometer range, any possible obstruction will inevitably lead to a malfunction of the injector. If after verifying, this noise originates from another part of the engine of your Audi A7, browse this article content for more informations.
The consequences of injector noise on Audi A7
Now that we have reviewed the several causes for injector noise on your Audi A7, we will end by stating the possible end result 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 consequences which can fairly quickly 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 effects 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 undoubtedly have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will fairly 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>
