The Top 6 Signs of Bad Fuel Injectors


The amount of fuel delivered to the combustion chamber is controlled by fuel injectors, which ensures that it is delivered on time.

Fuel injectors are an important part of keeping your car engine clean and efficient. However, without regular maintenance, fuel injections can create errors or interruptions, so you need to know how to fix the characteristics of a bad fuel injector.

Here we provide all the information like what are car fuel injections, how do they work and general features to look out for when something goes wrong.

What are fuel injections?

Fuel injectors with electronic control valves spray fuel into the car engine, which can open and close several times per second. For optimal combustion and efficiency, they have an atomizer that distributes petrol or diesel evenly. Injectors were introduced to replace the old carburetor system, which allowed the engines to operate at higher fuel efficiency and reduce pollution.

A car usually has one fuel injector per cylinder.

A car usually has one fuel injector per cylinder. So, if you are driving a four cylinder car, it will have four fuel injectors.

How do fuel injectors work?

The amount of fuel delivered to the combustion chamber is controlled by fuel injectors, which ensures that it is delivered on time.

The injectors are activated using ECU (Engine Control Unit) sensors at the right time and the fuel is pumped and sprayed into the combustion chamber.

When the ECU injector is activated, compressed fuel is sprayed into the combustion chamber through a nozzle. Since the nozzles are so small, it burns more efficiently because the fuel is nucleated.

Sometimes fuel injectors can make mistakes that affect their performance or cause errors

Here are some common signs and symptoms associated with a faulty fuel injector.

Sometimes fuel injectors can make mistakes that affect their performance or cause errors. Although some mechanical and electrical problems affect the fuel injectors, it is often caused by debris.

Check the engine warning light

The most common indication of a bad fuel injector is the check engine warning light, which appears on the dashboard. When an injector does not do what it is supposed to do, this light comes on.

Although there may be some different reasons for changing the check engine light, it may be the fuel injector. The ECU alarm light is activated when the injector is more or less refuelled.

Faulty or vibrating machine

Does your car break down often? Or, is there a delay after you press the accelerator pedal? Both of these symptoms can be caused by a defective fuel injector, often with a blockage or obstruction in the nose.

If the injector fails to inject fuel called ECU, the fuel-air mixture in the combustion chamber becomes inoperative, causing it to malfunction or acceleration to slow down. That’s why it’s so important to keep your car’s fuel injectors clean and compliant.

Faulty or vibrating machine

Strict inactivity

If the idle noise of your car becomes harder and harder, the fuel injectors will not refuel. As a misfire, it is usually located under the injector nozzles, which become clogged with particles, which interfere with the spraying of atoms and fuel.

Many faults, including a bad spark plug or dirty air filter, can cause passive noise, clogging injectors is one of the most common causes.

The engine stops

Did your engine stop randomly or did you cut without doing anything to cause it? This is because fuel does not reach the engine from the injectors. If too little fuel reaches the combustion chamber, the ECU shuts off the engine and causes a stall.

The engine stops

Stopping the engine as a result of a failed injector usually involves an injector that connects to the fuel lines when the nozzle is badly blocked or a fuel leak.

Fuel leak

If you can smell fuel strongly while driving and your car displays other signs on this list, you may be looking for a fuel leak. Fuel leaks occur where the injector meets the injector and the injector is old and not properly maintained.

By inspecting the fuel injector, you can tell if there is a leak in or near the fuel injector. You may also see a decrease in fuel quality.

Poor fuel system

Improper fuel injection can lead to a significant downturn in the fuel economy. This is because the ECU needs more fuel from the injector, but it does not reach the combustion chamber. Your fuel efficiency will decrease when less fuel reaches the engine.

Maintenance of fuel injectors

The easiest way to clean and maintain fuel injectors is with the Redex fuel system cleaner. Available for gasoline and diesel engines, our specialized cleaning products remove particles from fuel injectors.

If you want to reduce your pollution or help the environment before your MOT, you should check out our innovative products and new dedicated emission reducers. Watch the video below to learn more about how Redex helps keep your car injectors clean and tidy.

Final words

In the case of your fuel injectors, a defective or electrical problem may send a warning signal to the engine system that activates your cars ‘check engine’ light. As an odor, it should mix as quickly as possible.

If you think your car has a faulty fuel injection, check with an expert mechanic before making it worse.

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