What exactly are spark plugs, what do they do, and why and when do they need to be changed? Here are a few questions that when through my mind when I was told that I needed to have my spark plugs changed. Because I understand not everyone is well versed in the answers to these questions, I’ve put together what I thought was important to know when it comes to spark plugs.

Spark plugs are the keys to igniting your engine. They are what carry the spark to the engine and fuel, which gives your vehicle the kick that it needs to start.

There are a couple main reasons why you might have to change your spark plugs. Some choose to keep their vehicle maintained well by changing their spark plugs when their vehicles manufacturing manual suggests. Check your vehicles manufacturing manual to find out at what mile to change your spark plugs.

You want to prevent using your spark plugs over the amount of time that they should be used. If your spark plugs are over used you will find that your car will have to work harder to get that spark and start your car. You’ll also notice that your car will idle roughly.

To find out other reasons why you may need to change your spark plugs, you might have to turn to a local professional. These reasons are usually because they are worn, have bad wires or may be fouled. To really spot these you would have to watch the cylinders firing patters for each one.

If your spark plugs age long enough you might not even be able to start your car. As they corrode over time they wont be able to ignite any spark and your engine will have to overwork to produce one.

If your car cranks but doesn’t start, the best thing to do is check your spark plugs. If you find that they are wearing out or are no longer working you have far passed the appropriate time to change them. You might want to bring it into a car shop to make sure that the spark plugs are truly the issue.

Spark plugs can also need to be tightened. Be careful with tightening them, and always make sure that you have checked the manufacturers manual for any additional requirements or warnings about spark plugs. If you don’t know how to change your spark plugs it is a very inexpensive service that most local car shops provide.