It is hardly ever pleasant to listen to an injector noise on your Alfa Romeo 156. It is a noise that happens frequently, usually when you accelerate or your engine is idling. However, this sign may be relating to multiple sort of complications with your vehicle injectors. It may not be anything severe, but when a frequent noise arises, you have to be sure. Specifically since fixing your Alfa Romeo 156’s injectors can be expensive. That’s why our team chose to produce this content in order to help you see more clearly, learn about the different possible failures and distinguish your issue. To do this, we will first look at the normal running and usefulness of the injectors in your Alfa Romeo 156, then at the possible reasons from which an injector noise may come.
Benefits of the injectors
Injectors are a very important part of the operation of your engine unit. 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 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 accumulated from the various sensors equipping the vehicle (engine temperature, acceleration level, engine speed, etc.). Their purpose 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 based on the injectors of your Alfa Romeo 156
Listening injector noises on your Alfa Romeo 156 may come from different origins, we will now focus on the potential causes of these. In general, the regular noise of a faulty injector is of the snap type. Here are the different origins of these noises and the solutions to be applied to stop them. If you listen to another clicking noise but it is not from your injectors, we encourage you to browse this content about clicking noise on Alfa Romeo 156 to locate the cause.
The explanations for injector clicking or knocking noise Alfa Romeo 156
A clicking or knocking noise from your injectors can be justified by different explanations. Indeed, the injectors of your Alfa Romeo 156 have three main tasks, to manage the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to facilitate its combustion. Then, its objective is to deal with the air/fuel dosage and at last the homogeneity of the mixture, always with the goal of improving combustion. If one of these three features 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 due to bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will provoke thoses knocking or clicking noises on your Alfa Romeo 156. The main cause of these situations commonly originates from a particle that gets into the injectors. The precision of the injector being in the nanometer range, any possible obstruction will inevitably end in a malfunction of the injector. If after checking, this noise originates from another part of the engine of your Alfa Romeo 156, read this content for more infos.
The effects of injector noise on Alfa Romeo 156
Now that we have reviewed the several causes for injector noise on your Alfa Romeo 156, we will end by stating the possible effects 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 effects which can promptly become considerable….
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 common repercussions felt by drivers is a serious loss of power. Indeed, if your engine is running on 3 out of 4 cylinders for example, you will undoubtedly have a loss of power
Finally, you risk deteriorating one of your pistons or your engine. Poor combustion will promptly damage your cylinders or pistons and your engine may tighten.
Here are three little tips to limit the risks connected 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 swapping your diesel fuel filter regularly>
