It is hardly ever pleasant to listen an injector noise on your Volkswagen Polo 4. It is a noise that appears repeatedly, usually when you accelerate or your engine is idling. However, this warning sign may be related to multiple kind of complications with your automobile injectors. It may not be anything major, but when a frequent noise comes out, you have to be sure. Most importantly since fixing your Volkswagen Polo 4’s injectors can be expensive. That’s why our team decided to write this content in order to support you see more clearly, learn about the different plausible failures and determine your problem. To do this, we will first look at the normal running and usefulness of the injectors in your Volkswagen Polo 4, then at the plausible reasons from which an injector noise may come.
Functions of the injectors
Injectors are a very fundamental component of the operation of your engine. They were launched to the modern automobiles 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 accurately (quantity of fuel injected, air/fuel mixture) via the analysis of the data accumulated from the various sensors equipping the automobile (engine temperature, acceleration level, engine speed, etc.). Their goal 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 causes of a clicking or knocking noise based on the injectors of your Volkswagen Polo 4
Hearing injector noises on your Volkswagen Polo 4 may originate from different origins, we will now look into the potential triggers of these. Generally, the usual noise of a faulty injector is of the snap type. Here are the different origins of these noises and the solutions to be put into practice to get rid of them. If you listen another clicking noise but it is not from your injectors, we advise you to read this content about clicking noise on Volkswagen Polo 4 to locate the reason.
The explanations for injector clicking or knocking noise Volkswagen Polo 4
A clicking or knocking noise from your injectors can be justified by different explanations. In fact, the injectors of your Volkswagen Polo 4 have three main tasks, to control the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to ease its combustion. Then, its mission is to manage the air/fuel dosage and finally the homogeneity of the mixture, always with the aim of improving combustion. If one of these three attributes is modified, 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 because of bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will trigger thoses knocking or clicking noises on your Volkswagen Polo 4. The main reason of these problems 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 cause a malfunction of the injector. If after checking, this noise comes from another part of the engine of your Volkswagen Polo 4, check this content for more infos.
The side effects of injector noise on Volkswagen Polo 4
Now that we have reviewed the several reasons for injector noise on your Volkswagen Polo 4, we will end by stating the possible 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 side effects which can fairly quickly become critical….
First, you risk destroying your exhaust system 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 basic repercussions noticed by drivers is a significant 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 degrading one of your pistons or your engine. Poor combustion will fairly quickly damage 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>
