It is hardly ever relaxing to hear an injector noise on your Audi A2. It is a noise that happens regularly, usually when you accelerate or your engine is idling. However, this sign may be related to different kind of complications with your automobile injectors. It may not be anything severe, but when a persistent noise shows up, you have to be sure. Specifically since replacing your Audi A2’s injectors can be costly. That’s why our team chose to produce this article in order to help you see more clearly, learn about the different possible failures and determine your issue. To do this, we will first look at the normal function and usefulness of the injectors in your Audi A2, then at the possible reasons from which an injector noise may come.
Benefits of the injectors
Injectors are a very important component of the operation of your engine. They were brought in to the modern vehicles 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 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 automobile (engine temperature, acceleration level, engine speed, etc.). Their aim 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 A2
Finding out injector noises on your Audi A2 may come from different locations, we will now look into the potential causes of these. Generally, the usual noise of a faulty injector is of the snap type. Here are the several sources of these noises and the solutions to be adopted to prevent them. If you hear another clicking noise but it is not from your injectors, we recommend you to browse this article about clicking noise on Audi A2 to locate the cause.
The reasons for injector clicking or knocking noise Audi A2
A clicking or knocking noise from your injectors can be explained for different reasons. In fact, the injectors of your Audi A2 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 task is to control the air/fuel dosage and at last the homogeneity of the mixture, always with the aim of improving combustion. If one of these three characteristics 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 due to bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will induce thoses knocking or clicking noises on your Audi A2. The main cause of these situations in most cases comes from a particle that gets into the injectors. The precision of the injector being in the nanometer range, any possible obstruction will inevitably end up in a malfunction of the injector. If after checking, this noise comes from another component of the engine of your Audi A2, read this article for more infos.
The end result of injector noise on Audi A2
Now that we have reviewed the different reasons for injector noise on your Audi A2, 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 almost instantly 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. In fact, if your engine is running on 3 out of 4 cylinders for example, you will inevitably have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will almost instantly affect your cylinders or pistons and your engine may tighten.
Here are three little recommendations 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>
