It is never pleasurable to notice an injector noise on your Ford Focus. It is a noise that appears continually, usually when you accelerate or your engine is idling. However, this symptom may be relating to different sort of trouble with your car injectors. It may not be anything major, but when a persistent noise appears, you have to be sure. Especially since replacing your Ford Focus’s injectors can be expensive. That’s why our team chose to prepare this content page in order to support you see more clearly, learn about the different possible failures and identify your issue. To do this, we will first look at the normal function and usefulness of the injectors in your Ford Focus, then at the possible causes from which an injector noise may come.injector-noise-ford-focus

Benefits of the injectors

Injectors are a very useful component of the operation of your engine unit. They were launched to the modern vehicles about 20 years ago. Before their appearance, 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 accumulated from the various sensors equipping the car (engine temperature, acceleration level, engine speed, etc.). Their goal 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 origins of a clicking or knocking noise based on the injectors of your Ford Focus

Discovering injector noises on your Ford Focus may result from different locations, we will now focus 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 implemented to get rid of them. If you notice another clicking noise but it is not from your injectors, we recommend you to read this content page about clicking noise on Ford Focus to locate the cause.

The explanations for injector clicking or knocking noise Ford Focus

A clicking or knocking noise from your injectors can be justified by different explanations. Indeed, the injectors of your Ford Focus 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 deal with the air/fuel dosage and finally the homogeneity of the mixture, always with the objective of improving combustion. If one of these three functions 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 because of bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will provoke thoses knocking or clicking noises on your Ford Focus. The main cause of these concerns generally 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 up in a malfunction of the injector. If after checking, this noise originates from another part of the engine of your Ford Focus, read this content page for more informations.

The side effects of injector noise on Ford Focus

Now that we have analyzed the diverse causes for injector noise on your Ford Focus, we will end by stating the possible end result of malfunctioning one or more of your injectors. Whether only one is clogged, or broken, or your entire fuel rail is involved, you cannot escape these consequences which can fairly quickly become severe….
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 basic repercussions noticed by drivers is a distinctive 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 degrading one of your pistons or your engine. Poor combustion will fairly quickly damage your cylinders or pistons and your engine may tighten.
Here are three little recommendations to limit the risks relating 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>