11 signs of bad spark plug wires |Symptoms of a Bad Spark Plug Wires (2022)

Are you looking for the common signs of bad spark plug wires? we will cover all that in this post. Spark plug is one of the things in a car you shouldn’t take for granted likewise the spark plug wires. So today we are going to look at some symptoms and signs of bad spark plug wires that way you can tell when to change them.

These 11 symptoms of bad spark plug wires are ideally thecommon and most obvious signs you will see when your plug wire is bad.

I will give you my one cent on the question is “ does changing spark plug wires improve performance”?

signs of bad spark plug wires | Symptoms of a Bad Spark Plug Wires

For a car engine to function optimally, the spark plug mustbe in perfect condition. The size of a car plug is small, but the function isincredible. When the spark starts getting bad, the general performance of theengine will be limited.

Ideally, a car plug wire transfers electrical power from avehicle ignition system to its engine spark plugs. If the spark plug is in goodcondition, the engine works fine. That is to say, without the spark plugs, theengine won’t work. When a car starts acting sluggishly, the spark plug can bethe problem.

Spark plugs are not what you buy on an annual basis. Spark plugs stay longer before it goes bad. A normal spark plug has a greyish white insulator, while that of a bad spark plug is covered with substances/stains like oil and fuel.

Expectedly, a clean and good spark plug ensures a normalengine operation. When it starts going bad, there are signs/symptoms to lookout for. With these symptoms, you should replace the spark plugs.

(Video) How to: Check a misfire & replace HT ignition leads

Before we get to the symptoms let look at a question we gotrecently which is “does changing spark plug wires improve performance?”

Related Article: Spark plug Replacement cost

Does changing spark plug wires improve performance?

Well, my response to this question is yes, and that is because the spark plug wires are what makes possible for the spark plug to get the required voltage jolt of electricity from ignition coil in other to ignite the spark plug. So without a good spark plug wires ignition of the plugs will not occur.

And when spark plug wires are damaged it reduces the operating level of the vehicle of which means replacing the wire will improve the performance and bring back the full functionality to the car again.

Watch this video to see how you can replace a bad spark plug wires.

11 signs of bad spark plug wires | symptoms of a bad spark plug wires in cars.

Here are the 11 signs of bad spark plug wires to take notice of then you are ready to change your plug wires. Mind you, in some case it not just be a bad wire. it could even be a bad spark plug itself and this why this article will guide further on missing spark plug and what to do or not do.

(Video) 10 symptoms of bad spark plugs

  • #1- Reduced gas mileage

There’re other symptoms of a bad spark plug wire to look out for, but reduced gas mileage is common signs of bad spark plug wires and can be very frustrating too. Mileage is a number of miles covered. A good spark plug and wires in good conditions can cover much distance(s), but with a bad spark plug wire, your journey can be shortened.

  • #2 – Hard starts

When your car refuses to start, it might not a battery faultbut, a bad spark plug wire. Hard starts is one of the most common bad sparkwire issues. Bad plugs can also drain the battery, stopping the engine frompicking up. If you are certain it is not a battery issue, then you shouldreplace the spark plug as soon as possible.

  • #3 – Engine misfiring

Engine misfiring is one of the known symptoms of a bad spark plug wire in a car. This usually occurs when there is incomplete engine combustion. Engine misfires, because the cylinders are not working or firing fine. With a bad spark plug, the vehicle will halt and continue. When the spark plug wire is bad, it will cause an erratic flow of electrical current to the engine.

  • #4 – Slow acceleration

Next signs of bad spark plug wires are slow acceleration. Apoor acceleration is a quick way to tell you that the spark plug wire is faulty.All you need to is to change the spark plug.

Don’t forget to also read this article: Can you drive a car with a missing spark plug?

  • #5 – Rough engine idling

Rough engine idling is also an electrical issue that developswhen the spark plug wire is bad. It is also a common symptom that needs anurgent replacement of your spark plug. A bad spark plug wires can affect thesmooth flow of electrical current which can cause a rough engine idling.

  • # 6 – Poor fuel economy:

Poor fuel economy in a car is a worrisome situation. There could be other reasons like a catalyst issue. But, a bad spark plug wire is a suspect. When the spark plug is bad, the fuel economy decreases due to incomplete combustion. Get a new spark plug and the fuel economy will be back to normal.

  • #7 – Reduced engine power

A reduced engine power fault is a result of a cut or break in the spark plug wire. When this happens, the engine will not function optimum, or it may not even start at all. For proper engine combustion and maximum engine power, the spark plug wire must be in good condition to ensure electrical current is passed into the engine.

(Video) SE Phat Spark Plug Wires Are they good or bad?

  • #8 – Engine surging:

When you notice an engine surging issue in your car, act fast. This is a common sign of a bad spark plug wire in a car. An engine surge happens when there is a short spurt of sufficient electrical flow. Engine surging occurs when there are cracks or broken wires outside the insulation. Without an adequate flow of electrical power, the engine won’t pick. Engine surging is one of the symptoms of a bad spark plug. Replacing it will get your car back on the road.

  • #9 – Knock-like noises from the car:

Usually, no knock-like noises should be considered as‘’nothing’’. This kind of noise can be a sign of a bad spark plug wire. Thiscan be noticed from the force of the pistons, which means the combustion is notworking. To prevent other issues from coming up, get a new spark plug.

  • #10 – Vehicle Engine light comes on:

You’ll probably need the service of an auto mechanic or anauto electrician that will use computer to help you check or scan to see if theengine light is on. A bad spark plug can cause engine misfiring which can alsoset on the engine light. An illuminated engine light is one of the symptoms ofa bad spark plug wire.

  • #11 – Car Engine hesitation

And the last symptomsof bad spark plug wires on the list here is engine hesitation. Engine hesitation can possibly mean yourspark plug is bad. It usually happens during acceleration. Engine hesitationoccurs when there is inadequate electrical current flow to the engine. Theamount of electrical current from the car battery to engine is not adequate. Thiscan cause an engine to hesitate. Getting a new spark plug will remedy thesituation.

Conclusion on Signs of bad spark plug wires

The car plug is linked to engine performance. Spark plugs is a very important component in the engine. Spark plugs ignites the combustion chambers to burn the mixture of fuel and air to enable the vehicle to move.

When the spark plug is bad, the engine will not function well. Usually, car spark plugs last long. However, the longevity depends on the type of spark plug. Spark plugs are made from durable materials that can withstand tons of explosions before it starts getting bad.

When you see any of the listed symptoms, that means it is high time you got a new spark plug. There are different spark plugs in the market. When replacing a spark plug, it is important you get the same brand and model of spark plug that the vehicle came with. YOu might want to check some recommendation on Amazon with links below.

These are the signs of bad spark plug wires we will cover in this post. I hope this article helps helped you place feel free to share.

(Video) Replacing bad spark plug and spark plug wires.. | Vlog#12

Read Next: symptoms and reason for a Misfiring Spark Plug

Jeffery Ekweghi
(Video) Learn everything about spark plug wires, firing order, and much more! How to become a gearhead EP6

AutoBody Part Mechanic | More posts from Author

Hi dear, my name is Jeffery Ekweghi, and I am a certified mechanic and autobody parts technician. I created this site to share my expertise and experience with car lovers who are looking for how to resolve their car-related issues. I am certified in private cars and heavy-duty commercial vehicles. I have worked as a mechanic since 2015 and have experience in vehicle brands like Subaru, Jeep, Toyota, TATA, BMW, Mazda, Honda, Nissan, Kia, TVs, and Others; however, I primarily specialize in Toyota vehicles.

FAQs

How can I tell if my spark plug wires are bad? ›

The most obvious sign of faulty spark plug wires is your vehicle just feels a little 'off. ' It would probably start slowly with reduced gas mileage but could progress to no acceleration. Faulty spark plug wires or spark plug misfires can also cause problems starting your engine, a rough idle, and loss of power.

What happens when you have bad spark plug wires? ›

Bad spark plug wires can interfere with the electrical current flowing to the engine, making it difficult for the engine to complete the combustion cycle. An incomplete combustion cycle can cause an engine to misfire, which means your car may jerk, stumble, or briefly lose power.

Can bad spark plug wires cause hard start? ›

' It might just start slowly with diminished fuel efficiency but could progress all the way to a lack of acceleration. Fouled spark plug wires or spark plug misfires will also lead to difficulty starting the engine, a rough idle once started, and even low power.

How do I know if my spark plug wires are connected? ›

Range the plug wire is faulty. And needs to be replaced when replacing the plug wires make sure to

Can bad spark plug wires cause no spark? ›

Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.

Can bad spark plug wires cause hesitation? ›

Bad spark plug wires will ultimately affect your engine's performance. When you have bad spark plug wires, you'll experience engine surging, engine hesitation, engine surging, and rough idling.

What happens if spark plug wire resistance is too low? ›

Lower resistance means more of the ignition coils energy is going towards bridging the gap or the spark plug. That hotter spark can create a more even burn of the fuel/air mixture in the cylinder, and thus, more power output from the engine. Also, all the shielding inside a wire is not free.

What causes weak ignition spark? ›

A weak spark, or no-spark, problem may originate within one or more common ignition system components: Worn or damaged spark plug wire insulation. At high temperature, this problem can produce bucking or misfires. Dirty or worn spark plug.

How do you test ignition coil wires? ›

Testing A 2 Wire COP Ignition Coil - YouTube

Can bad spark plug wires cause check engine light? ›

A problem with either your spark plug wires or the spark plugs themselves could cause your check engine light to come on. Ignoring this problem may lead to a clogged catalytic converter, damaged ignition coils, or problems with your oxygen sensor.

How do you test spark plug wires? ›

How to Test Spark Plug Wires - YouTube

How do I know if my distributor cap is bad? ›

Your vehicle may make some very strange noises if the distributor rotor and cap are malfunctioning – specifically because the cylinders will try to fire but fail. You might hear a tapping, clicking, or sputtering sound when the distributor rotor and cap are failing.

Does changing spark plug wires improve performance? ›

In most cases, you'll see a noticeable difference in performance after replacing your spark plugs and wires. The engine will run smoother and faster, and the car will have better acceleration. You may also notice an improvement in fuel economy.

When should you replace spark plug wires? ›

Like all maintenance services, the ideal interval for changing your spark plugs and wires depends on the manufacturer's recommendations. Most cars need them done at 30,000 to 60,000 miles, while others are good until 100,000 miles.

Can wiring cause misfire? ›

Damaged or Failing Spark Plug Wires: If your car has spark plug wires (not coil packs), then the wires may be the source of a misfire. If the insulating coating on the wire has been compromised, it's possible that the bare wire is touching a metal component in the engine and shorting out. This will cause a misfire.

What does engine misfire feel like? ›

If it feels like your vehicle is accelerating slower than usual or if it feels rough, the cause could be an engine misfire. You'll also likely notice excessive vibrations when your engine misfires. Misfires happen infrequently, meaning your car will drive fine most of the time.

What does an engine misfire sound like? ›

So what does an engine misfire sound like? The most common descriptions of an engine misfire are a sound like a popping, sneezing, banging, chuffing, or a backfire, usually when the engine is anywhere between 1,500 – 2,500 rpm.

What are the symptoms of engine misfire? ›

Symptoms Of A Misfire
  • Rough Idling. Engines that idle in a clunky or rough manner could be suffering from misfiring. ...
  • Sluggish Acceleration. Your car might have trouble reaching adequate speeds if your engine is misfiring. ...
  • Engine Sound Changes. ...
  • Black Exhaust. ...
  • Your “Check Engine” Light Might Illuminate.
12 Feb 2021

What sensors can cause no spark? ›

A Bad Crankshaft Position Sensor

The crankshaft position sensor monitors the position and rotational speeds of the crankshaft. Without the crank sensor, the engine control module (ECM) wouldn't know when to fire the fuel injectors and ignite the spark plugs.

What causes no fuel pressure and no spark? ›

If there is no spark or fuel, then the first thing I would do is check the vehicle's fuses and relays, particularly the EFI main and ignition relays. It may be possible that one of these components has failed and is cutting off power to the vehicle's ignition and fuel systems.

Can crank sensor cause no spark? ›

A failed crankshaft positioning sensor can cause your engine tp have no spark. In most modern ICE engines they all use electronic ignition and engine management systems. Theses systems depend on the signal sent from the crankshaft position sensor to determine what cylinder is coming up on top dead center (TDC).

Why is my car bucking when I accelerate? ›

Worn-out spark plugs or the electrical cables attached to them are one of the most common causes of cars stuttering. A deficient spark plug causes the engine to misfire, making your car jerk when you accelerate.

How many ohms should a plug wire have? ›

Simply attach or hold a meter probe on each end of the cable and read the total resistance on the meter. The Society of Automotive Engineers suggests the maximum resistance should be 12,000 ohms-per-foot.

Can old spark plugs affect acceleration? ›

Lack of acceleration

If your vehicle has lost its get-up-and-go, bad spark plugs could be the culprit. When a spark plug becomes fouled or dirty, it doesn't spark effectively which can cause your car to perform sluggishly.

How much resistance should a spark plug have? ›

When spark plugs are new, the resistance value is between 500 and 3000 ohms. As the plug ages, values below 5000 ohms are acceptable. But once the plug's resistance value exceeds 5000 ohms, the plug should be replaced.

Are thicker spark plug wires better? ›

That thicker wire core provides a lower operating resistance, allowing more spark energy at the spark plug. This thicker core, once wrapped in the insulating material and outer jacket, is what dictates the larger overall spark plug wire diameter.

How much resistance does a spark plug wire have? ›

For copper core wires, the resistance will be 1 to 6500 ohms, inductive wires the resistance will be 2200 to 8000 ohms per 1 meter or 650 to 2500 ohms per foot and carbon wires, the resistance is 10000 to 23000 ohms per 1 meter or 3000 to 7000 ohms per foot.

How do I make my ignition spark stronger? ›

3 Ways to Get More Spark from a Car Ignition System
  1. Change Your Spark Plugs. The easiest place to start is by upgrading your spark plugs to platinum or iridium. ...
  2. Upgrade the Plug Wires. ...
  3. Timing Changes.
6 Jun 2018

What color is a weak spark? ›

The strength of the spark is revealed in the color. A red or yellow spark is weak and probably will not spark in the cylinder. A blue or white spark is strong and has enough voltage to fight across the spark plug gap even under pressure within the cylinder.

How do I know if my spark is strong enough? ›

The proper method to check for spark is with a spark tester. It resembles a spark plug but has a sunken center electrode that simulates a load on the coil. Holding the plug wire and seeing if a spark jumps to ground is inconclusive. The spark is arcing in atmospheric pressure.

What are the 2 wires on ignition coil? ›

Show activity on this post. The usual idea is that with 2 wires; one is ignition controlled 12v and goes to the resistor (block on the side with two terminals) so that the coil receives about 9v during normal running.

How do you test an ignition control module? ›

How to test an ignition coil/module with a test light (distributor ignition)

How do you test a coil with a screwdriver? ›

How Do I test my car for spark? Here's how to! - YouTube

What is the most common cause of check engine light? ›

Oxygen Sensor

A faulty oxygen sensor will return a check engine warning every time. In fact, it's one of the most common reasons why a check engine light comes on while you're driving your automobile.

What does it mean when your engine light keeps flashing? ›

A flashing check engine light indicates a much more serious issue. Most often it means that the engine is misfiring and unburned fuel is getting into the exhaust system. This raises the temperature of the catalytic converter and can cause critical damage.

Why is my car shaking and the check engine light flashing? ›

In general, if the check engine light is flashing and the car is shaking then there is a problem with one or more engine components. The problem could lie with the fuel supply, or a faulty ignition coil, bad spark plugs, or a bad engine sensor.

How can you tell if a wire is good? ›

How to check if there is a break in a wire using a multimeter - YouTube

Should a spark plug have continuity? ›

How to Test Spark Plugs Using a Basic Multimeter - YouTube

Does the length of a spark plug wire matter? ›

A spark plug wire length chart can help you know which category of wire to buy based on how long the wire is. You really only want to use wiring just long enough to get from the spark plug to the distributor. This will prevent wires from getting in the way of other moving parts under the hood.

What will be the problem of bad ignition distributor wires? ›

If there is any issue with the spark plug wires the engine spark can be disturbed, which can result in engine performance issues such as misfires, a reduction in power and acceleration, as well as a reduction in fuel efficiency. In severe cases bad cables may even result in engine stalling.

What does a bad distributor sound like? ›

Noises are one of the bad distributor symptoms to watch out for. You might hear popping noises when your engine misfires or backfires, but a bad distributor can also cause a high-pitched squealing noise.

What does a bad cap and rotor look like? ›

Signs of Worn Distributor Cap and Rotor - YouTube

What happens if you mix up spark plug wires? ›

What is even more imperative than matching cable length is that you do not mix up the order of the spark plug wires. Improper installation of these wires can result in poor combustion or misfiring of the cylinder, which will cause drivability issues and potentially severe damage to the engine.

Do expensive spark plug wires make a difference? ›

High-quality wires will allow the spark plugs to start faster and keep your engine running more effectively. Save money. Routinely swapping out your spark plug wires can save you cash. Driving on faulty wires can end up damaging your vehicle if you don't switch out the wires quickly enough.

What do new spark plug wires do? ›

Spark plug wires (also referred to as ignition wiring) transfer the spark from the distributor or ignition coil to the plugs. The subsequent spark ignites the air-fuel mixture in the combustion chamber of your engine.

What is the most common cause of a misfire? ›

The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks.

What causes ignition coils to keep going bad? ›

The leading cause of premature failure of an ignition coil is due to a worn or bad spark plug ignition cable. A bad spark plug ignition cable will have a much higher than normal resistance. This high resistance causes a very high amount of voltage to be generated from your ignition coil's secondary winding.

What causes ignition coils to fail? ›

The overheating of ignition coils can hinder their ability to conduct electricity. Wear and tear is a common reason for ignition coils failing. It causes degrading of the insulation between the primary and secondary coil windings and the primary coil. The reduction in insulation can cause the coil to overheat.

How do you check spark plug wires? ›

How to Test Spark Plug Wires - YouTube

Does it matter which spark plug wire goes where? ›

Learn everything about spark plug wires, firing order, and ... - YouTube

How often do spark plug wires go bad? ›

spark plug wires are expected to wear out eventually, often after 60,000 to 100,000 miles, though that can vary by manufacturer. they can also become faulty ahead of schedule. oil or coolant leaks can damage ignition wires. to prevent reoccurring problems, the leaks will need to be repaired as well.

What sensors can cause misfire? ›

If an oxygen sensor or mass airflow sensor is failing, it could give incorrect data to your engine's computer, causing the misfire. When a vacuum line is broken, it can cause a fuel-injected motor to misfire.

How do I know if my ignition wires are bad? ›

The most obvious sign of faulty spark plug wires is your vehicle just feels a little 'off. ' It would probably start slowly with reduced gas mileage but could progress to no acceleration. Faulty spark plug wires or spark plug misfires can also cause problems starting your engine, a rough idle, and loss of power.

How do you tell if a cylinder is not firing? ›

How to Tell Which Cylinder is Misfiring! - YouTube

What does a car sound like when it needs new spark plugs? ›

Engine Knocking

Sometimes, especially while accelerating, you will hear your engine making a distinct knocking sound. That sound is caused by your spark plugs not detonating properly and igniting all the fuel. The fuel and vapor that did not ignite eventually will catch fire and detonate.

What does a misfire feel like at idle? ›

Technically, a misfire is the result of incomplete combustion (or zero combustion) inside one or more of an engine's cylinders. But to you, the driver, the problem will usually feel like hesitation or shaking when the car is running. On modern vehicles, the check engine light will also pop on when there's a misfire.

What causes a car to misfire at idle? ›

Many system malfunctions can cause misfires or rough idling. Ignition system components, including spark plugs, plug wires, ignition coils and ignition timing are culprits as are lean air/fuel mixtures and mechanical issues within the engine.

How do you stop engine misfire? ›

The best way to avoid an engine misfire condition is through following the scheduled maintenance in your manual. Keep your vehicle's engine tuned according to factory specs. Plus, a yearly trouble-code scan by a well-equipped shop will uncover any potential problems before they become major faults.

Can a clogged catalytic converter cause a misfire? ›

Unfortunately, a clogged catalytic converter can lead to an engine misfire. Misfires are caused by incomplete combustion in the cylinder, which can overheat the converter and cause irreversible damage to your engine.

Can a camshaft sensor cause no spark? ›

As a camshaft position sensor weakens, so does the data it transmits to the ECM. Eventually the data signal becomes so weak the ECM switches off fuel and spark delivery, and your engine will not start.

How do you reset a camshaft position sensor? ›

Unfortunately, there's no way to reset a camshaft position sensor. If you're having camshaft issues (check engine light on, acceleration trouble, sputtering and stalling, etc.), you'll have to replace the part entirely.

What sensors can cause no spark? ›

A Bad Crankshaft Position Sensor

The crankshaft position sensor monitors the position and rotational speeds of the crankshaft. Without the crank sensor, the engine control module (ECM) wouldn't know when to fire the fuel injectors and ignite the spark plugs.

What is the first thing that one should check if an engine does not start crank? ›

ENGINE CRANKS BUT YOUR CAR WILL NOT START

When the engine cranks normally but you car won't start, you need to check ignition, fuel and compression. Ignition is easy enough to check with a spark tester or by positioning a plug wire near a good ground.

What causes no fuel pressure and no spark? ›

If there is no spark or fuel, then the first thing I would do is check the vehicle's fuses and relays, particularly the EFI main and ignition relays. It may be possible that one of these components has failed and is cutting off power to the vehicle's ignition and fuel systems.

What would cause no spark to spark plugs? ›

Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.

When should you replace spark plug wires? ›

Like all maintenance services, the ideal interval for changing your spark plugs and wires depends on the manufacturer's recommendations. Most cars need them done at 30,000 to 60,000 miles, while others are good until 100,000 miles.

Does changing spark plug wires improve performance? ›

In most cases, you'll see a noticeable difference in performance after replacing your spark plugs and wires. The engine will run smoother and faster, and the car will have better acceleration. You may also notice an improvement in fuel economy.

How often do spark plug wires go bad? ›

spark plug wires are expected to wear out eventually, often after 60,000 to 100,000 miles, though that can vary by manufacturer. they can also become faulty ahead of schedule. oil or coolant leaks can damage ignition wires. to prevent reoccurring problems, the leaks will need to be repaired as well.

How long are spark plug wires good for? ›

A quality set of spark plug wires can generally last around 60,000 to 70,000 miles. Again, it is a good idea to replace these parts prior to a failure, like a misfire. A vehicle that is running rough or misfiring can cause catalytic converter damage.

Should spark plug wires touch each other? ›

Spacing spark plug wires too close or parallel to each other can also result in crossfiring due to the inductive field which builds up in one wire as the current flows in the other. It's best to hold spark plug wires in position by using insulated metal, or better yet plastic or fiber brackets to avoid this.

Does it matter which spark plug wire goes where? ›

Learn everything about spark plug wires, firing order, and ... - YouTube

What does a misfire feel like? ›

A misfire feels like your engine suddenly loses power. You might experience a hesitation when you try to accelerate the vehicle. If it feels like your vehicle is accelerating slower than usual or if it feels rough, the cause could be an engine misfire.

How do you test ignition wires? ›

How to Test Spark Plug Wires - YouTube

Are thicker spark plug wires better? ›

That thicker wire core provides a lower operating resistance, allowing more spark energy at the spark plug. This thicker core, once wrapped in the insulating material and outer jacket, is what dictates the larger overall spark plug wire diameter.

Do expensive spark plug wires make a difference? ›

High-quality wires will allow the spark plugs to start faster and keep your engine running more effectively. Save money. Routinely swapping out your spark plug wires can save you cash. Driving on faulty wires can end up damaging your vehicle if you don't switch out the wires quickly enough.

What causes weak ignition spark? ›

A weak spark, or no-spark, problem may originate within one or more common ignition system components: Worn or damaged spark plug wire insulation. At high temperature, this problem can produce bucking or misfires. Dirty or worn spark plug.

Can bad spark plug wires cause check engine light? ›

A problem with either your spark plug wires or the spark plugs themselves could cause your check engine light to come on. Ignoring this problem may lead to a clogged catalytic converter, damaged ignition coils, or problems with your oxygen sensor.

How do you fix spark plug wires? ›

How To Very Easily FIX A BROKEN SPARK PLUG WIRE!! - YouTube

How often should you replace your ignition coils? ›

The ignition coil on car is supposed to last around 100,000 miles or more. You will have reduced gas mileage when coil begins to go bad and becomes less able to transfer power. Your car requires more fuel to run, this means you will spend more money on gas than normal.

How do you set the gap on a spark plug? ›

How to Gap a Spark Plug - YouTube

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