Here's All You Need To Know About Fuel Injector Issues, Repair & Replacement


Fuel injectors are an essential part of the internal combustion engine. 

It regulates speed and acceleration by continuously modifying the input of air & fuel in the engine.

It takes the liquid form fuel to supply the same in an atomized state to the intake multifold onward injection of the engine to its combustion chamber.

More fuel is allowed to the engine When you step on the throttle through the injector to increase the vehicle speed.

Let's dive into comprehensive details of fuel injector issues, repair and replacement. 

What Is A Fuel Injector?

The motor supplies fuel via the injectors, hence, known as fuel injectors.

It shoots pressurized gasoline or diesel in narrow nozzles to the engine's combustion chambers.

The nozzles thrust the fuel into a spray due to which it operates optimally with specific motors.

The process of spray helps achieve the optimum mix of air and fuel to sustain combustion.

How The Fuel Injectors Get Dirty?

Fuels that you use in your car are never perfectly clean. 

So when they run through the system, it causes soot (carbon) deposition leaving the carbon in the engine.

Mostly, all the soot is in the combustion chambers, leaving the carbon deposits.

Moreover, many filling stations provide fuel supply with less ethanol and additives making it dirtier.

Ethanol leaves behind more carbon deposits and gunk. 

Diesel is also not a cleaner option, likewise, you still need to clean nozzles with premium fuels.

The fuels contain detergents making you spend more on it.

The difference in premium and traditional fuel is that you don't need to clean much with premium options.

Do you know how to clean fuel injectors without removing them?

There is a DIY fuel injector cleaning process through which you can clean it in 7 simple steps

Do Dirtier Injectors Harm The Vehicle?

The nozzles are designed to create spray patterns. 

The build-up of carbon and soot causes an issue with spray patterns.

It causes the fuel to not go in the combustion chamber in the usual way. 

Hence, you will observe a drop in the car's performance.

You can also lose horsepower, low power, incompetent starting torque, and low fuel economy.

Further, the clogged injectors can cause severe issues like power loss that will result in expensive repairs.

Always pay attention to check engine signs for fuel injector and other critical issues.

The signs of injector issues are throttle drop or motor noises.

Can A Leaking Injector Cause Car Fire?

Leaking injectors is a good recipe for a car fire. It can be both internal or external to cause the fire.

The proper injector pumps fuel supply at high pressure. 

Its mechanical failure's common scenarios can be the side cracking due to the fuel injector's high pressure.

It mostly occurs in substandard fuel injectors.

Such failure can cause an external leak as fuel will leak from the injector to the side, where the hot engine section generally causes a fire.

The fuel injector can fail because of the damaged or faulty O-Rings (fuel injector seal).

The O-Ring leak is noticeable in the sequential and multi-port fuel injector system, making fuel rails used to simultaneously supply gasoline to other injector ports.

The O-Ring damage causes fuel to leak through them to the multifold engine intake than the fuel injector nozzle.

It will create wet petrol flow in the intake multifold then into an atomized state of fuel, generally within its manifold.

It will lead to the scenario where the liquid fuel can reach the combustion chamber then into the oil sump below.

The seal will start to fail when the sump gets filled, and the blend of oil & fuel will leak in the body in the generally hot sump.

It can also cause a fire.

What Is The Biggest Issue In Fuel Injectors?

Dirty nozzles are the most significant issues with fuel injectors. 

They become dirty over time if you don't maintain it.

Without proper maintenance, it gets partially blocked with dirt accumulation. 

The injector soaks heat when you shut off the engine causing the leftover fuel to evaporate, leaving behind the deposition that blocks the system in the long run.

How Frequently Should You Clean Fuel Injectors? 

You should at least clean fuel injectors once a year. 

However, if you are careless and don't clean it, then the carbonaceous deposits will increase and harden over time into a layer that will hinder the care functionality.

If you don't use your car frequently, still make sure to keep the fuel injectors clean after every 15,000 miles milestone.

When Do You Require Fuel Injector Replacement?

In case your fuel injector issue is more prominent than typical concerns, then you might have to replace the fuel injectors in its entirety.

Or it will create more difficulties for the engine. 

In case you observe fuel injector malfunction, then take the car to a professional and licensed workshop.

The below 4 signs will help you to know if it is best to replace the fuel injectors:

  1. In case there is smoke emission
  2. Or the cylinders misfires
  3. The car doesn't start even when your tank is full
  4. The check engine light is on more frequently

Final Words

As the famous line goes that prevention is better than cure.

Therefore, you should try to take preventative steps by enforcing maintenance than finding a solution when it happens. 

The fuel injector cleaning is essential that can help you dodge many issues.

Although if the fuel injectors exhibit indications of problems, start cleaning it as soon as possible.

In case you lose control over the situation, then look for the best automotive repair in Doylestown, contact A&G Customs today.

They provide a wide variety of automotive services, including brake repair, inspections, auto bodywork, custom paint, interior work, towing, restorations, and general maintenance. 

A&G Customs is a local one-stop auto repair shop in Doylestown.

You can easily reach them at 215 669 3072.