It is never relaxing to listen an injector noise on your Volkswagen Beetle. It is a noise that happens frequently, usually when you accelerate or your engine is idling. However, this sign may be linked to multiple types of trouble with your car injectors. It may not be anything major, but when a repeated noise shows up, you have to be sure. Specifically since fixing your Volkswagen Beetle’s injectors can be expensive. That’s why our team decided to write this article in order to support you see more clearly, learn about the different possible failures and determine your trouble. To do this, we will first look at the normal functioning and usefulness of the injectors in your Volkswagen Beetle, then at the possible triggers from which an injector noise may come.injector-noise-volkswagen-beetle

Purposes of the injectors

Injectors are a very significant 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 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 compiled from the various sensors equipping the car (engine temperature, acceleration level, engine speed, etc.). Their objective 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 reasons of a clicking or knocking noise based on the injectors of your Volkswagen Beetle

Discovering injector noises on your Volkswagen Beetle may come from different origins, we will now look into the potential triggers of these. Generally, the regular noise of a faulty injector is of the snap type. Here are the different origins of these noises and the solutions to be adopted to eliminate them. If you listen another clicking noise but it is not from your injectors, we suggest you to read this article about clicking noise on Volkswagen Beetle to locate the cause.

The explanations for injector clicking or knocking noise Volkswagen Beetle

A clicking or knocking noise from your injectors can be justified by different explanations. In fact, the injectors of your Volkswagen Beetle 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 finally the homogeneity of the mixture, always with the aim of improving combustion. If one of these three characteristics 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 resulting from bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will provoke thoses knocking or clicking noises on your Volkswagen Beetle. 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 end in a malfunction of the injector. If after verifying, this noise originates from another part of the engine of your Volkswagen Beetle, read this article for more informations.

The consequences of injector noise on Volkswagen Beetle

Now that we have examined the several causes for injector noise on your Volkswagen Beetle, we will end by stating the possible side 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 repercussions which can quickly become considerable….
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 distinctive loss of power. In fact, if your engine is running on 3 out of 4 cylinders for example, you will surely have a loss of power
Finally, you risk degrading one of your pistons or your engine. Poor combustion will quickly harm 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 changing your diesel fuel filter regularly>