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Spark Plugs

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Symptoms of Bad or Failing Spark Plugs
Common signs of faulty spark plugs include slow acceleration, loss of power, poor fuel economy, engine misfires, and difficulty starting the car.
How to Change Your Spark Plugs
Tune-ups have changed a lot over the years. Your grandpa’s car had a distributor with points that required periodic replacement. Thankfully, computers have taken control in modern cars, eliminating the...
What Does It Mean When an Engine "Knocks"?
If your engine is making a knocking noise it means there's a problem. The wrong fuel octane, carbon buildup, and bad spark plugs can cause knocking.
How Long Does an Ignition Cable (Spark plug wires) Last?
The ignition of a car is an essential part of a good running engine. Each time that you turn the key of your car over to crank it, the ignition wires will...
How to Find Top Dead Center
There are many reasons why you might need to find an engine’s top dead center. Top dead center is the point when the piston of the number one cylinder in an...
How Long Do Spark Plugs Last?
In order to operate, your engine needs fuel and air. However, those two things alone won’t make it run. It needs a way to ignite the fuel after mixing it with air...
How to Buy Good Quality Spark Plugs
Sparks make everything happen! Without spark plugs, your vehicle would never be able to kick off combustion, providing the necessary power to make your car go forward. If your engine is starting...
What Causes a Car to Backfire?
You’ve got an image of it in your head right now. An old car drives off jerkily from a...
How to Gap a Spark Plug
The spark plug is used to ignite the air/fuel mixture inside the engine. The spark plug must be in good condition and must be properly gapped for proper engine...
How to Check Spark Plug Wires
Car engines that have a distributor or remote coil pack have spark plug wires that transfer the spark from the coil to the spark plug.
How to Read Your Spark Plugs
Car spark plugs create the spark necessary in the combustion cycle. Check your spark plugs to improve your engine efficiency and performance.
What Does a Spark Plug Do?
Your ignition system is pretty complex, and there are a number of important components that must work with one another to crank the engine and then keep it running. Your spark plugs are...
What Does Ignition Timing Mean?
Timing – it has a couple of different meanings when applied to your car’s engine. One of the most critical is ignition timing (not to be confused with engine timing). Ignition timing refers...
How to Buy a Good Quality Ignition Cable (Spark Plug Wires)
Spark plug wires connect the spark plug to what they’re creating a spark in. Whenever you are changing out your spark plugs, it’s a good idea to check on those spark plug wires to...

Related questions

Question
Hello Chris, Do you know how many Spark Plugs do I need to change on my 2008 BMW 750li?
This engine has eight cylinders with only one spark plug per cylinder. You have a total of eight spark plugs.
Question
I have a 2002 toyota camry and my car starts and turns off after about 10 mins after at first it would not crank so i got a new st
Hello, thank you for writing in. There are several reasons why the vehicle may be stalling. You should ALWAYS start by having the vehicle scanned for codes when there is an issue, regardless of a warning light being illuminated. When...
Question
Why am I getting quotes for spark plug replacement for a 2008 Toyota Avalon of 495?
Spark plugs on your model do require relatively more labor time to replace, compared to other vehicles. That is why the quote you are getting seems high for a part that is so simple. However, your general supposition that the...
Question
when should i replace spark plugs
The service life of spark plugs on this vehicle is 100,000 miles. If the plugs have never been replaced, exercise caution during removal as the plug threads can get quite stuck to the head, and possibly seized, if too much...
Question
Do you use iridiums spark plugs on the spark plug replacement
The OEM plug is platinum. If you desire iridium, simply note that in the customer notes or let the mechanic know at time of scheduling. Obviously, without contrary advice, the original, or aftermarket equivalent, of a part is always used...
Question
I have a 2001 Lincoln LS and the spark plug on the number 8 cylinder is leaking getting oil on the spark plug what do you think th
Sometimes there can be oil on the spark plug threads but the plug itself is not fouled. If the firing end of the plug is OK (not fouled, and not covered with liquid oil and so forth), the cause of...
Question
I have a 2006 Hyundai Azera Limited all the cylinder are misfire would this stop the car from starting up?
Hello, thank you for writing in. The vehicle is not starting because of the issue causing the misfire. If not cylinders are firing when they are being told to, there will be no combustion, and the car will not run....
Question
What is the main reason for a random misfire on Audi A6 2002 3.0
Hello, thank you for writing in. Without the codes that are present it is hard to narrow down the possibilities for you. Coil packs and fuel supply are going to be towards the top of the list. You should start...
Question
how many spark plugs does a cadiliac cts 2017 have?
This engine has one spark plug and coil per cylinder. This is a 4 cylinder engine. Has 4 spark plugs.
Question
My V70 sputters intermittently.
I have seen where the electrical connectors to the ignition coils fall apart and will intermittently lose connection and short out. Have the connectors checked to see if they are bad and need repaired or replaced. As far as the...
Question
Joshua how much will it cost to replace all coils and plugs
Hello, thank you for writing in. The technician's do not have the ability to create proper quotes due to the pricing of labor and parts being dependent on your location. With that being said, I can share some of the...
Question
Engine shaking
Hello, thank you for writing in. One question that needs answering is what are the plugs wet with? While it is most commonly oil, coolant and fuel an also foul the spark plugs. If fuel is the issue, you need...
Question
Why is my 2004 chevy malibu classic wont start in the morning when its cold/moist outside but when it gets hot my car will start
You may have spark plug wires that are arching to ground and when cold and damp the plugs needs extra power to jump plug gap and wires ground out first before spark gets to plugs. Try replacing plug wires and...
Question
only passenger side plug is carbon build up driver side is clean change plug doing same thing
Hello, thank you for writing in. The most common cause of carbon build up on the spark plugs is unburned fuel, also known as "running rich". Despite the assumption that the injectors are to blame, it usually has more to...
Question
my car has 116k it is a 2004 fx35 how much would my maintenance cost be at his mileage
Hello, thank you for writing in. Replacing the coils is not part of any regular maintenance. It will be an additional charge no matter where you go. However, they are meant to work for a longer period of time than...
Question
How many hours does it take to change spark plough in a 03 Tiburon
The book time is 2.6 hours to replace 6 spark plugs. This does not include replacing plug wires or coil if needed. Also does not include diagnosis.
Question
I have a 2004 GMC Sierra 1505.3 V-8 what’s a long lasting to Portland for the truck
The spark plugs from the factory are AC R41-985 and can come in Iridium or Platinum tip spark plugs. Both of these plugs are designed to last up to 100,000 miles. There are other spark plug brands and may be...
Question
Why aren't my sparkplugs sparking?
Hello, thank you for writing in. The first two components to look at are the distributor and the coil. If you have a spark tester, test light, or voltmeter, you can measure the power supply along the circuit and find...
Question
I was changing my spark plugs and one of the plugs cracked and some debrie now what should I do.
If you got some pieces of spark plug into the cylinder of the engine then you may have damaged the inside of your cylinder walls or piston and valves. In extreme cases put holes in the piston and broke piston...
Question
Went to change ignition cool and spark plug....:old spark plug is completely missing. Could it have fallen into the cylinder?
If the spark plug has broken and ceramic part of plug fell inside cylinder then you will need to try and remove pieces with a camera and grab fingers or the head will need to be removed. If plug fell...

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