E3 Spark Plugs Problems – Troubleshooting & Fixing

E3 spark plugs are a specific type created especially for gasoline-powered engines. Because of the insulated electrode in it, hotspots and misfires occur less frequently and run at a higher rpm. 

Low voltage, faulty electrical connections, and broken ground wire or insulation are some of the core problems e3 spark plugs face. Problems with the oxygen sensor, gas cap, and MAF sensors can also lead to trouble with the spark plug. 

Let’s take a look at the E3 spark plug problems and learn how to troubleshoot them on your own. 

E3 Spark Plugs Problems

Troubleshooting And Fix For E3 Spark Plug Problems 

Compared to conventional spark plugs, E3 spark plugs are made to provide better performance, durability, and fuel efficiency. 

These plugs are a popular option among mechanics and auto enthusiasts since they use cutting-edge technology to improve combustion and lower emissions,

However, E3 spark plugs have a tendency to wear more quickly than other spark plugs. 

Additionally, they could oversmoke, misfire, create sparks, or emit too much CO2 into the exhaust system. The faulty spark plug can cause a fire or an abrupt explosion.  

These are some of the most common e3 spark plug problems that users have reported up until now:

1- Damaged Wire Insulation

The chances of an engine misfire increasing are potentially due to broken or damaged plug wire insulation. The insulation around the wires of e3 protects it from short-outs. 

When it is damaged, the wires overload with electrical charge and create sparks. This leads to the misfiring of the engine.

You can find the damaged or broken spark plug wire by checking the wires. You need to find a replacement that is compatible with the E3 spark plug. 

This is because the material used for this spark plug is specially designed for insulation. Once replaced, keep an eye on the insulation and replace it whenever you see it getting cracked or damaged.

2- Electric Connection Issues

E3 spark plugs are connected to the engine with the help of a strategically designed electrical circuit. 

Over time, these electric components become loose or start getting corroded. As a result, the engine faces problems during the combustion process and creates sparks.

Check if all the wires and electrical components are connected tightly to fix connection issues. Look for corrosion in the system regularly. Clean the corroded area with a specific wire brush and reconnect to test it.

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 3- Damaged Gas Caps

Any issues with the gas cap of the gasoline-powered engine also lead to a bigger spark plug problem. The gas evaporates from the tank if the gas cap is loose, damaged, or missing. 

This outflow of gas directly affects both the spark plug and the environment. The engine loses mileage by about 0.5%. 

Replacing the gas cap is the best way to solve this little problem. The type of gas cap will differ depending on the model and year of the engine. It can cost you $10-$30 for this replacement. 

4- Low Voltage Problemsa

When the e3 spark plug is worn out, it affects the voltage provided to the system’s electrodes. This low voltage causes the spark plug’s electronic control unit (ECU) to short circuit. 

As a result, the engine starts to misfire. Failure of the ignition coil is also another reason for low voltage issues.

If your spark plug itself is worn out, there is no other way than to replace it to get the correct voltage. 

Similarly, replacing the failed ignition coil will also fix the problem. Contact a mechanic or an expert to diagnose the low voltage level.

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5- Faulty O2 and MAF Sensor

The O2 sensor measures the amount of oxygen still unburned. The MAF (mass air flow) sensor measures the amount of air entering the engine. 

Any kind of problem with either of these sensors leads to stalling, poor acceleration, or misfiring. Thus, these sensors end up creating problems for the E3 spark plugs.

The solution to this is to replace the faulty sensor. You can replace the MAF sensor for anywhere from $150-$600. Replacing an O2 sensor will cost around $200 in total. 

6- Disrupted Ground Wires

The starter, alternator, and distributor are powered directly from the battery through the ground wires that connect them. The spark plug cannot provide the required spark when these wires malfunction. 

So the gasoline is unable to burn within the engine cylinder. Corrosion or frayed, loose ground wiring could be at fault for this.

Disconnect the battery and find the corroded places in the ground wire. Clean the corrosion with sandpaper or a cleaner solution. 

Reattach the ground wire to the earth or a metal building frame for neutralization. Tighten any loose connections to the ground wire.

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How To Replace An E3 Spark Plug?

After a thorough diagnosis, if you’ve come to the conclusion that you need to replace the E3 spark plug, this section is for you. 

Most of the problems of misfiring, sparking, or knocking will cease once you install a new spark plug. Learning how to replace an e3 spark plug will be useful because this component often needs replacement. 

  • Turn the car’s engine off by removing the connections under the hood.
  • One by one, remove the positive and negative battery terminals by pulling them outward. Wait until they snap back into place. 
  • Use a wrench or a flathead screwdriver to remove the e3 spark plugs from their designated place. 
  • Remember to purchase the right type of e3 spark plugs needed for your vehicle.
  • Install each of the new e3 spark plugs securely into their place.
  • Set the gap between the plugs properly, as instructed in the manual.
  • Fix the recommended torque for the spark plugs according to the e3 spark plug website information.
  • Now, reinstall the cables of the spark plug again by pressing them together until they snap to place.
  • Start the engine and rev it several times to test the spark plugs working smoothly without misfiring.

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Can You Drive with e3 spark plug issues?

You can’t keep driving with e3 spark plug issues. Damaged e3 spark plugs greatly threaten the well-being of the car and yourself. 

If you continue driving without replacing or fixing any of the components, the sparks keep getting more dangerous.

At one point, these sparks could be enough to start a fire inside the vehicle. 

Among many electrical circuits, a small amount of fire could be enough to cause an explosion. 

Therefore, you shouldn’t keep driving before handling the problems with the e3 spark plugs.

Here are some of the signs that indicate you should soon stop driving and fix the e3 spark plug issue:

  • The car stalls when turning it on
  • The engine misfires very loudly.
  • Check engine light comes on
  • Increased fuel consumption and reduced gas mileage
  • Loud knocking, rattling, and hissing came from the engine.
  • The car will fail to accelerate at the right time.

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A few more concerns regarding the e3 spark plugs and their issues are discussed in this section. Take a look at these questions and see if they answer your inquiries.

How Long Does E3 Spark Plugs Last?

E3 spark plugs can last a total of 5 years from the date of purchase. On mileage, it can go 100,000 kilometers before needing a change. This lifespan varies from how you drive and the type of spark plugs you use.

How Can I Diagnose If My E3 Spark Plugs Are Bad?

To test the e3 spark plugs’ functionality, remove the plugs from their place first. Then, turn the ignition on and use a voltmeter to measure the voltage. If the voltage is lower than ideal, the spark plugs are bad.

What Are The Symptoms Of E3 Spark Plug Problems?

Lack of acceleration, misfiring, high fuel consumption, and poor engine start are some of the most obvious symptoms. E3 spark plug symptoms might include gradual or complete failure of the engine.


Many users have reported facing these problems with their e3 spark plugs in the last few years. However, once fixed, their performance is too good for anyone to stop using them.

Even if the process of troubleshooting e3 spark plugs is a little time-consuming, it will help you in the long run. The sooner you fix the e3 spark plug problems, the sooner you can continue driving your car.

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