How Often Do You Change Spark Plug Wires?

The atomized fuels in a vehicle’s engine cylinders are ignited by spark plugs, which supply the electricity required for combustion. However, they can only accomplish this if they have a steady power source.

To do this, your spark plug wires must be in place. Just like with your plugs, the wires will eventually wear out. How often do you need to change your spark plug wires? Let’s dive in.

How Many Years Do Spark Plug Wires Last?

Extended-life spark plugs, which may maintain a perfect gap for 100,000 miles or more, are a selling point for many vehicles. Spark plugs that reach the 80,000-mile mark are likely to be 80% worn out, so don’t wait that long to replace them.

The performance of the engine and gas economy begins to decline as the plug gap grows. Removing them may be a time-consuming and expensive process once this has occurred. It’s advisable to change your vehicle’s spark plugs relatively before you run into trouble.

If your car has long-lasting spark plugs, you should still get them checked every 30,000 miles. During this examination, the air filter, fuel system, cabin air filter, brakes, tires, and ignition system should all be tested.

By doing these checks regularly, the vehicle owner will know if any repair work is required. When servicing and repairs are carried out, the vehicle’s value, exhaust and emissions system, safety, and dependability are preserved.

What Are the Symptoms of a Bad Spark Plug Wire?

Rough engine idling is the most prevalent indicator of bad spark plug wires. These wires are in charge of delivering electrical current from a vehicle’s electricity supply to the main engine plugs.

This electricity is used to ignite the engine’s air and fuel mixture. Bad spark plug wires may obstruct the regular passage of electrical current to a vehicle’s spark plugs, resulting in a harsh, inconsistent engine idle.

Spark plug wires are critical for every car’s electrical system. When they begin to fail, you will notice several indications of defective ignition leads that will alert you that something is wrong.

Failure to immediately identify and address the causes of these warning signs may result in more significant problems.

Engine surging is a typical sign of a vehicle electrical issue. It occurs when a vehicle has quick bursts of sufficient electrical flow to its spark plugs, alternating with brief intervals of diminished or nonexistent electrical flow.

Engine surging is a frequent indicator of defective spark plug wires, particularly if they have cracks or fractures in their exterior insulation.

This may produce high resistance and lead to abnormal or entirely interrupted electrical flow to a car’s spark wires.

Improper fuel flow or poor electric conduction to a vehicle’s spark plugs are the main reasons for engine slowdown during acceleration.

Bad spark plug wires cause delayed or untimely ignition, which can further exacerbate the issue by potentially damaging your engine,

Does Changing Spark Plug Wires Improve Performance?

Yes, replacing the spark plugs and wires may improve the performance of your car.

New spark plugs keep your engine running at top performance and efficiency. Of course, any car on the road will sometimes misfire. However, when such misfires get more regular, they become more worrisome. Misfires regularly result in higher exhaust pollutants, wasted gas, and diminished power. Older automobiles may buck, stall, run rough, or start slowly due to misfires produced by worn spark plugs.

New spark plugs may help cold starting greatly. When spark plugs are worn or unclean, a greater voltage is required to generate a strong enough spark to start a car. You may have driven your battery dead by the time you’ve cranked the motor a dozen times to get it to start, and you now have two issues.

Keeping a solid set of spark plugs in your car means lower power needs for your ignition system. This reduces the likelihood of a malfunction and leaves more capacity for the starter and injectors.

How Long Does Ngk Spark Plug Wires Last?

According to NGK, they have an expected lifespan of 40,000 – 50,000 miles. However, one must remember that this can vary based on driving circumstances and car makeup. We’ve observed that an untouched engine will typically last 60,000 to 80,000 kilometers.

Wrap Up

Spark plug wires, while resilient, can even wear down from physical and thermal insults over time. This increases overall resistance and requires higher voltages to continue normal function. Over time, the issue will worsen, leading to poor ignitions, misfires, poor gas economy, and a bright “Check Engine” light. If the problem persists and there is sufficient degradation, the current may short circuit or arc, leading to performance issues and potential damage to other components. It is essential to check and change your spark plug wires on time.

Leave a Comment