It is hardly ever pleasurable to hear an injector noise on your Subaru Crosstrek. It is a noise that arises regularly, usually when you accelerate or your engine is idling. However, this symptom may be linked to multiple types of problems with your vehicle injectors. It may not be anything severe, but when a persistent noise happens, you have to be sure. Most importantly since replacing your Subaru Crosstrek’s injectors can be expensive. That’s why our team decided to prepare this article in order to help you see more clearly, learn about the different possible failures and determine your problem. To do this, we will first look at the normal functioning and usefulness of the injectors in your Subaru Crosstrek, then at the possible causes from which an injector noise may come.
Functions of the injectors
Injectors are a very significant element of the operation of your engine motor. They were launched to the modern vehicles about 20 years ago. Before their introduction, 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 precisely (quantity of fuel injected, air/fuel mixture) via the analysis of the data received 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 get the best possible combustion in the cylinders.
The different triggers of a clicking or knocking noise based on the injectors of your Subaru Crosstrek
Listening injector noises on your Subaru Crosstrek may originate from different locations, we will now focus on the potential triggers of these. Generally, the typical noise of a faulty injector is of the snap type. Here are the several sources of these noises and the solutions to be adopted to get rid of them. If you hear another clicking noise but it is not from your injectors, we suggest you to browse this article about clicking noise on Subaru Crosstrek to discover the trigger.
The reasons for injector clicking or knocking noise Subaru Crosstrek
A clicking or knocking noise from your injectors can be explained for different reasons. Indeed, the injectors of your Subaru Crosstrek 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 mission is to manage the air/fuel dosage and finally the homogeneity of the mixture, always with the target of improving combustion. If one of these three features is altered, the main purpose 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 Subaru Crosstrek. The main trigger of these problems generally comes from a particle that gets into the injectors. The accuracy of the injector being in the nanometer range, any possible obstruction will inevitably produce a malfunction of the injector. If after checking, this noise comes from another part of the engine of your Subaru Crosstrek, have a look at this article for more infos.
The end result of injector noise on Subaru Crosstrek
Now that we have examined the diverse reasons for injector noise on your Subaru Crosstrek, we will end by stating the possible effects of malfunctioning one or more of your injectors. Whether only one is obstructed, or broken, or your entire fuel rail is involved, you cannot escape these side effects which can fairly quickly become severe….
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 common effects experienced by drivers is a significant loss of power. Indeed, if your engine is running on 3 out of 4 cylinders for example, you will inevitably have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will fairly quickly affect your cylinders or pistons and your engine may tighten.
Here are three little suggestions 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>
