It is rarely ever pleasant to hear an injector noise on your GMC Sierra. It is a noise that arises continually, usually when you accelerate or your engine is idling. However, this symptom may be connected to several types of problems with your automobile injectors. It may not be anything severe, but when a frequent noise appears, you have to be sure. Especially since fixing your GMC Sierra’s injectors can be expensive. That’s why our team chose to create this content in order to help you see more clearly, learn about the different possible failures and determine your issue. To do this, we will first look at the normal running and usefulness of the injectors in your GMC Sierra, then at the possible reasons from which an injector noise may come.
Purposes of the injectors
Injectors are a very important part of the operation of your engine. They were introduced to the modern cars 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 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 obtained from the various sensors equipping the automobile (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 get the best possible combustion in the cylinders.
The different causes of a clicking or knocking noise based on the injectors of your GMC Sierra
Discovering injector noises on your GMC Sierra may originate from different locations, we will now focus on the potential causes of these. In most cases, the usual noise of a faulty injector is of the snap type. Here are the several origins of these noises and the solutions to be put into practice to get rid of them. If you hear another clicking noise but it is not from your injectors, we recommend you to read this content about clicking noise on GMC Sierra to find the trigger.
The causes for injector clicking or knocking noise GMC Sierra
A clicking or knocking noise from your injectors can be justified by different causes. Indeed, the injectors of your GMC Sierra have three main missions, to manage the vaporisation of the fuel, i.e., to transform the liquid into “gas” during injection, to facilitate its combustion. Then, its task 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 characteristics is altered, 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 as a consequence of bad timing, or a bad quantity of mixture or finally an inhomogeneous mixture and will provoke thoses knocking or clicking noises on your GMC Sierra. The main trigger of these trouble in most cases comes from a particle that gets into the injectors. The precision of the injector being in the nanometer range, any possible obstruction will inevitably lead to a malfunction of the injector. If after checking, this noise comes from another component of the engine of your GMC Sierra, read this content for more informations.
The consequences of injector noise on GMC Sierra
Now that we have reviewed the different causes for injector noise on your GMC Sierra, we will end by stating the possible end result of malfunctioning one or more of your injectors. Whether only one is blocked, or broken, or your entire fuel rail is involved, you cannot escape these effects which can almost instantly 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 effects experienced by drivers is a severe 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 almost instantly damage your cylinders or pistons and your engine may tighten.
Here are three little tips 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>
