How Do Dealerships Clean Fuel Injectors


The engine in your car is made up of many parts, including the fuel injector. These are devices that help deliver liquid gasoline to each cylinder for combustion.

The way they work is by injecting small amounts of gas at very high pressures into the intake port or channel of the cylinders. This pressurizes the air-gas mixture, which allows for more efficient burning and therefore better performance from the engine.

Too much pressure can cause damage to the valves that control how well gases burn, as well as break down the insulating properties of the cylinder head. If left unchecked, this could lead to permanent engine failure.

In some cases, older vehicles may not have needed cleaning due to the design of the injection system. But newer engines typically use piezo electric sensors instead of mechanical systems to measure when the injector needs to be cleaned.

These types of sensors are less prone to wear and tear so dealers will more frequently recommend it. However, if you feel confident doing it yourself, go ahead! Just make sure you do it correctly. (More about that below.)

Removing carbon buildup

Mostly, people refer to these things as “cleaning” the fuel injector. While this seems simple enough, there are different opinions on what kind of cleaner to use and how best to apply it. Some say using alcohol removes contaminants while others claim water does the same.

Equipment needed

how do dealerships clean fuel injectors

To perform an internal cleaning of your injector, you will need to have some basic equipment. You can source all of this equipment online or through automotive dealerships.

Most importantly, you will want a good quality fuel filter. A fuel filter is used to remove contaminants from the liquid in the tank that could possibly be injected into the engine. Many experts recommend replacing your current filter with a high-quality one around every 500 miles to ensure better performance of your vehicle!

You also need plastic tubing which connects the filter to the injector. This tubing must be thin enough so as not to hinder the flow of fluid but strong enough to withstand pressure. Most technicians use silicone hose because it is durable and does not break down when exposed to fuel.

Last, you need a syringe. The length of the needle on the syringe doesn’t matter too much unless you are very careful where you put it. Short needles are easier to use since you don’t have to press hard on the plunger to create suction, just make sure there’s a nice steady stream of liquid entering the barrel.

How dealerships test and clean fuel injectors

how do dealerships clean fuel injectors

The process of testing and cleaning your car’s engine is called diagnostic inspection. This is done at an auto repair shop that has been verified by the manufacturer to have qualified technicians.

Most vehicle manufacturers recommend having your car inspected within 30 days of when you bring it in for service, at the very least once per year. Have the technician do this during routine visits or via online resources like

This will help ensure your car is working properly and can be run safely before needing repairs. It also helps the mechanic identify potential issues early so they can begin fixing them before something bad happens.

If you are ever not sure what part of your car needs work, ask about it! Most mechanics are happy to tell you all about their tools and how they use them. Sometimes they even let you watch them use them!

We suggest being familiar with some important terms such as “knock” and “ping.” These describe sounds your engine makes when it loses power, and whether that is due to a mechanical problem or poor gas quality.

Obtaining a clean bill of health

how do dealerships clean fuel injectors

The process for cleaning fuel injector nozzles is typically done in three steps. First, you have to determine if there are any blocked or plugged needles within the nozzle. If not, you can move onto your next step.

If yes, then you must use ultrasonic equipment to remove all dried fuel. After this is completed, you should take it one step at a time to avoid breaking down too much fuel.

The last part is to run each needle under high pressure to see if they function properly. If they do, great! You are done! But remember, only after these procedures are complete does that mean the engine will start!

It is important to note that this process works best when performed during daylight hours so that you can easily view the injectors.

Costs of injector cleaning

how do dealerships clean fuel injectors

The cost to have your car’s engine tuned up at a professional level can get expensive very quickly! Luckily, you don’t need to go through this process often, but when it is needed, there are things you can do yourself to save money.

Injected fuel contains additives that help engines run more efficiently. These additives work by helping reduce friction in various parts of the engine, allowing for better performance and efficiency. As such, most vehicle manufacturers include an additive package in their fuel as standard equipment.

However, some vehicles may not contain the full complement of additives found in regular gasoline. This is where it gets tricky.

If you’re ever faced with choosing whether or not to purchase new fuel, make sure you check if any additional additifes have come out recently. If they have, then choose the newer type over the older type unless you have reason otherwise.

The reasoning here is that newer types of fuel are more efficient so those companies spent money developing them to aid in overall engine performance.

Potential problems with fuel injectors

how do dealerships clean fuel injectors

There are several types of fuel injection systems used in cars today, and how well they work depends on the fluid that controls them. If this fluid gets too dry or thick, however, then the system can fail to function properly.

When this happens, your engine will not run as efficiently and will use more gas (fuel) to do the same amount of work. This is bad because you will be spending more money on gas, and you will be wasting more energy by powering the car using less efficient methods.

There are two main components in every type of fuel injection system — a pump and an injector. The pump sprays liquid through the nozzle into the intake pipe or port for the engine, while the injector delivers it at the right time and place.

The problem comes when both get clogged up. When this occurs, your vehicle may suffer from poor performance or even complete failure to start.

Fortunately, there are some easy ways to check if this has happened. First, make sure the pump is working… so what does it look like? It should be able to produce enough pressure to move the liquid through the nozzle, which it should.

Next, make sure the sprayer orifice in the injector is clear, and test it by spraying some water onto the floor or ground around where the engine would normally sit. It should spread out evenly, but if it doesn’t, then something might be wrong.

How to properly test fuel injectors

how do dealerships clean fuel injectors

The process of cleaning your vehicle’s engine is an important one, especially if you are experiencing poor performance or abnormal noises. Unfortunately, some people may try to take care of this task themselves and end up causing more damage!

If you are ever unsure of how to perform maintenance on your car, do not attempt it yourself! There are many resources available that can help teach you the basics of automotive repair. Some of these sites have free content as well so you do not need to be invested in the shop manual system completely before trying to fix your own cars.

The first step in testing your vehicle’s engine for potential issues is to determine whether there is fluid present in the engine. If there is none, then start looking at the other parts of the engine.

How to properly clean fuel injectors

how do dealerships clean fuel injectors

When performing an engine cleaning procedure, there are several things you should be careful not to do. You want to make sure that you don’t overdo it by pulling out too many components or using excessive amounts of fluid.

Some fluids can permanently damage the engine!

You also do not need to use expensive products to perform engine maintenance. There are some very inexpensive solutions that work just as well. Using simple table salt will help keep your engine running strong and healthy!

Table salt is commonly found at home stores and works by neutralizing acids in the oil. Because diesel engines produce lots of acid from the combustion process, having enough base in the form of salt can prevent corrosion and internal engine damage.

A small amount of table salt has been shown to effectively remove carbon buildup in fuel nozzles and clear out water deposits in intake valves.

What should you tell your customer when they ask you to clean their fuel injectors?

how do dealerships clean fuel injectors

The first thing most people do when their car is acting funny is check the fluid levels. They look at how much gas, oil, and coolant there are in the cars tank. However, this is not an effective diagnostic tool for finding the source of the problem.

It can be easy to confuse low fluid levels with bad engines due to poor maintenance, but only sometimes. Sometimes, it takes something else that has run out before you see signs of engine failure.

A lot of times, drivers will go into a shop to have their vehicle checked out and they will get told that their engines need new water pumps, plugs, or both.

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