It is never relaxing to hear an injector noise on your Subaru Legacy. It is a noise that arises frequently, usually when you accelerate or your engine is idling. However, this indicator may be linked to several types of complications with your vehicle injectors. It may not be anything major, but when a repeated noise appears, you have to be sure. Especially since replacing your Subaru Legacy’s injectors can be expensive. That’s why our team chose to prepare this article content in order to help you see more clearly, learn about the different conceivable failures and establish your issue. To do this, we will first look at the normal running and usefulness of the injectors in your Subaru Legacy, then at the conceivable causes from which an injector noise may come.
Attributes of the injectors
Injectors are a very significant element of the operation of your engine. They were launched to the modern cars about 20 years ago. Before their introduction, 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 possibility, 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 accumulated from the various sensors equipping the vehicle (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 caused by the injectors of your Subaru Legacy
Listening injector noises on your Subaru Legacy may result from different sources, we will now focus on the potential causes of these. In general, the usual noise of a faulty injector is of the snap type. Here are the several origins of these noises and the solutions to be used to eliminate them. If you hear another clicking noise but it is not from your injectors, we suggest you to browse this article content about clicking noise on Subaru Legacy to find the reason.
The explanations for injector clicking or knocking noise Subaru Legacy
A clicking or knocking noise from your injectors can be justified by different explanations. In fact, the injectors of your Subaru Legacy have three main tasks, to control the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to facilitate its combustion. Then, its goal is to control the air/fuel dosage and at last the homogeneity of the mixture, always with the target of improving combustion. If one of these three attributes is modified, the main role 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 Legacy. The main reason of these problems generally 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 verifying, this noise comes from another part of the engine of your Subaru Legacy, browse this article content for more infos.
The consequences of injector noise on Subaru Legacy
Now that we have examined the several reasons for injector noise on your Subaru Legacy, we will end by stating the possible consequences of malfunctioning one or more of your injectors. Whether only one is obstructed, or damaged, or your entire fuel rail is involved, you cannot escape these repercussions which can quickly become considerable….
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 known effects felt 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 surely have a loss of power
Finally, you risk degrading one of your pistons or your engine. Poor combustion will quickly affect your cylinders or pistons and your engine may tighten.
Here are three little tips to limit the risks associated 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 changing your diesel fuel filter regularly>
