It is never relaxing to acknowledge an injector noise on your Volkswagen Polo 5. It is a noise that arises regularly, usually when you accelerate or your engine is idling. However, this indication may be linked to several kind of problems with your car injectors. It may not be anything serious, but when a persistent noise arises, you have to be sure. Especially since replacing your Volkswagen Polo 5’s injectors can be expensive. That’s why our team chose to compose this content in order to support you see more clearly, learn about the different plausible failures and distinguish your trouble. To do this, we will first look at the normal functioning and usefulness of the injectors in your Volkswagen Polo 5, then at the plausible reasons from which an injector noise may come.
Functions of the injectors
Injectors are a very fundamental part of the operation of your engine unit. They were brought in to the modern cars about 20 years ago. Before their arrival, 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 goal 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 reasons of a clicking or knocking noise caused by the injectors of your Volkswagen Polo 5
Experiencing injector noises on your Volkswagen Polo 5 may originate from different sources, we will now concentrate on the potential triggers of these. In general, 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 used to stop them. If you acknowledge another clicking noise but it is not from your injectors, we advise you to browse this content about clicking noise on Volkswagen Polo 5 to find the cause.
The explanations for injector clicking or knocking noise Volkswagen Polo 5
A clicking or knocking noise from your injectors can be justified by different explanations. Indeed, the injectors of your Volkswagen Polo 5 have three main missions, to manage the vaporisation of the fuel, i.e., to convert the liquid into “gas” during injection, to facilitate its combustion. Then, its objective is to deal with the air/fuel dosage and finally the homogeneity of the mixture, always with the objective of improving combustion. If one of these three functions is modified, the main functionality 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 trigger thoses knocking or clicking noises on your Volkswagen Polo 5. The main cause of these trouble usually comes from a particle that gets into the injectors. The precision of the injector being in the nanometer range, any possible obstruction will inevitably lead to a malfunction of the injector. If after checking, this noise comes from another component of the engine of your Volkswagen Polo 5, read this content for more informations.
The effects of injector noise on Volkswagen Polo 5
Now that we have reviewed the several causes for injector noise on your Volkswagen Polo 5, we will end by stating the possible side effects of malfunctioning one or more of your injectors. Whether only one is clogged, or damaged, or your entire fuel rail is involved, you cannot escape these effects which can quickly become major….
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 regular effects felt by drivers is a serious 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 damage your cylinders or pistons and your engine may tighten.
Here are three little tips 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>
