It is never relaxing to notice an injector noise on your Renault Scenic 4. It is a noise that happens repeatedly, usually when you accelerate or your engine is idling. However, this symptom may be linked to multiple sort of problems with your vehicle injectors. It may not be anything severe, but when a persistent noise happens, you have to be sure. Especially since repairing your Renault Scenic 4’s injectors can be costly. That’s why our team decided to prepare this article in order to help you see more clearly, learn about the different conceivable failures and distinguish your problem. To do this, we will first look at the normal functioning and usefulness of the injectors in your Renault Scenic 4, then at the conceivable triggers from which an injector noise may come.
Functions of the injectors
Injectors are a very useful part of the operation of your engine. 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 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 collected 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 origins of a clicking or knocking noise caused by the injectors of your Renault Scenic 4
Finding out injector noises on your Renault Scenic 4 may result from different sources, we will now concentrate on the potential causes of these. In most cases, the regular 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 eliminate them. If you notice another clicking noise but it is not from your injectors, we encourage you to go through this article about clicking noise on Renault Scenic 4 to find the trigger.
The explanations for injector clicking or knocking noise Renault Scenic 4
A clicking or knocking noise from your injectors can be explained for different explanations. Indeed, the injectors of your Renault Scenic 4 have three main missions, to manage the vaporisation of the fuel, i.e., to convert the liquid into “gas” during injection, to facilitate its combustion. Then, its objective is to manage the air/fuel dosage and finally the homogeneity of the mixture, always with the objective of improving combustion. If one of these three features is modified, the main role 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 Scenic 4. The main trigger of these concerns usually comes 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 comes from another component of the engine of your Renault Scenic 4, browse this article for more infos.
The end result of injector noise on Renault Scenic 4
Now that we have examined the different reasons for injector noise on your Renault Scenic 4, we will end by stating the possible consequences of malfunctioning one or more of your injectors. Whether only one is clogged, 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 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 consequences noticed by drivers is a significant loss of power. Indeed, if your engine is running on 3 out of 4 cylinders for example, you will obviously 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 suggestions 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 swapping your diesel fuel filter regularly>
