How Often Should You Change Spark Plugs?

A vehicle's engine needs gas, air, and spark to operate. Therefore if a car's spark plug is broken or not put in correctly, the car might not work at all or just stop running.

Spark plugs must be maintained and replaced on a regular basis, although there is no actual timetable. So it falls to you as the owner, to examine the plugs on a regular basis and replace any that are broken.

What Is A Spark Plug?

A spark plug is a device that plugs into the engine's cylinder and generates a spark for combustion through a conduit from the battery. A four-cylinder engine has four spark plugs, but a V8 has eight.

Copper, nickel, iridium, and platinum are used in the formation of spark plugs and they are protected and insulated by ceramic.

Functions of a Spark Plug

A spark plug generates high-voltage electricity between a center and a ground electrode. The air-fuel mixture is ignited by the cylinder spark. This explosion causes the piston to fire.

Symptoms Of Bad Spark Plugs

  • The vehicle will not or can not start.
  • Inadequate idling.
  • Engine pinging or knocking.
  • Inadequate gas mileage.

Spark Plug Gapping

A gapped spark plug gives the proper amount of power at the right time. a corroded bolt, lost engine component, or oil leak might derail a project.

When should you change your spark plugs?

Spark plugs, regardless of vehicle condition, should be replaced every 30,000 miles. Otherwise they are likely to collapse sooner or later.

Should You Change All Spark Plugs At The Same Time?

Yes, changing all the plugs at once assures that everything works properly.

What happens if the spark plugs are not replaced?

Defective spark plugs might result in poor performance, low fuel economy, misfires, or your car not starting. They may result in engine wear.

What happens if the spark plugs are not gapped properly?

If your spark plug gap is incorrect, you may have carbon build up, misfiring, excessive fuel or knock.


If you need spark plug replacements, call or bring your vehicle to Knight Automotive today!

Knight Automotive is committed to ensuring effective communication and digital accessibility to all users. We are continually improving the user experience for everyone, and apply the relevant accessibility standards to achieve these goals. We welcome your feedback. Please call Knight Automotive (219) 663-0400 if you have any issues in accessing any area of our website.