It is never pleasurable to experience an injector noise on your Renault Megane 4. It is a noise that appears frequently, usually when you accelerate or your engine is idling. However, this warning sign may be linked to different sort of problems with your vehicle injectors. It may not be anything serious, but when a recurrent noise shows up, you have to be sure. Specifically since replacing your Renault Megane 4’s injectors can be expensive. That’s why our team decided to compose this content page in order to help you see more clearly, learn about the different plausible failures and distinguish your issue. To do this, we will first look at the normal running and usefulness of the injectors in your Renault Megane 4, then at the plausible triggers from which an injector noise may come.
Functions of the injectors
Injectors are a very useful part of the operation of your engine unit. They were brought in to the modern vehicles 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 accurately (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 aim 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 based on the injectors of your Renault Megane 4
Experiencing injector noises on your Renault Megane 4 may originate from different origins, we will now center on the potential triggers of these. Generally, the common noise of a faulty injector is of the snap type. Here are the several origins of these noises and the solutions to be adopted to stop them. If you experience another clicking noise but it is not from your injectors, we advise you to read this content page about clicking noise on Renault Megane 4 to discover the reason.
The causes for injector clicking or knocking noise Renault Megane 4
A clicking or knocking noise from your injectors can be justified by different causes. Indeed, the injectors of your Renault Megane 4 have three main tasks, to manage the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to ease its combustion. Then, its mission is to manage the air/fuel dosage and at last the homogeneity of the mixture, always with the aim of improving combustion. If one of these three tasks is modified, the main purpose of the injectors will be disturbed 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 Renault Megane 4. The main reason of these concerns in most cases originates from a particle that gets into the injectors. The accuracy of the injector being in the nanometer range, any possible blockage will inevitably cause a malfunction of the injector. If after verifying, this noise originates from another component of the engine of your Renault Megane 4, browse this content page for more informations.
The effects of injector noise on Renault Megane 4
Now that we have examined the different reasons for injector noise on your Renault Megane 4, we will end by stating the possible end result 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 consequences which can almost instantly become critical….
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 repercussions noticed by drivers is a serious 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 degrading one of your pistons or your engine. Poor combustion will almost instantly affect 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>
