It is hardly ever relaxing to listen to an injector noise on your Subaru Impreza. It is a noise that comes up frequently, usually when you accelerate or your engine is idling. However, this sign may be related to different kind of problems with your vehicle injectors. It may not be anything major, but when a repeated noise comes out, you have to be sure. Specifically since replacing your Subaru Impreza’s injectors can be costly. That’s why our team chose to prepare this article in order to support you see more clearly, learn about the different possible failures and distinguish your problem. To do this, we will first look at the normal running and usefulness of the injectors in your Subaru Impreza, then at the possible causes from which an injector noise may come.
Benefits of the injectors
Injectors are a very vital component of the operation of your engine motor. They were released to the modern automobiles about 20 years ago. Before their appearance, 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 compiled from the various sensors equipping the vehicle (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 causes of a clicking or knocking noise caused by the injectors of your Subaru Impreza
Listening injector noises on your Subaru Impreza may result from different sources, we will now focus on the potential causes of these. In most cases, the common noise of a faulty injector is of the snap type. Here are the different sources of these noises and the solutions to be used to get rid of them. If you listen to another clicking noise but it is not from your injectors, we suggest you to read this article about clicking noise on Subaru Impreza to discover the trigger.
The explanations for injector clicking or knocking noise Subaru Impreza
A clicking or knocking noise from your injectors can be explained for different explanations. Indeed, the injectors of your Subaru Impreza have three main missions, to control the vaporisation of the fuel, i.e., to convert the liquid into “gas” during injection, to facilitate its combustion. Then, its task is to deal with the air/fuel dosage and at last the homogeneity of the mixture, always with the target 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 as a consequence of bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will trigger thoses knocking or clicking noises on your Subaru Impreza. The main trigger of these trouble usually originates from a particle that gets into the injectors. The accuracy of the injector being in the nanometer range, any possible blockage will inevitably end in a malfunction of the injector. If after verifying, this noise originates from another part of the engine of your Subaru Impreza, browse this article for more infos.
The side effects of injector noise on Subaru Impreza
Now that we have reviewed the several causes for injector noise on your Subaru Impreza, we will end by stating the possible effects 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 effects which can quickly become severe….
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 experienced by drivers is a serious loss of power. Indeed, 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 recommendations to limit the risks linked 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>
