how often to change spark plugs

How Often to Change Spark Plugs – 4 Signs a Bad Plug

How often you change spark plugs sometimes depends on vehicular usage. Spark plugs are responsible for creating sparks that’s ignite the air and fuel in the combustion chamber.

Spark plugs being a very important part of combustion process in the engine, they are made to be very durable. Plugs are designed to last very between every 80,000 and 100,000 miles in active use.

However, it is important to keep them service every 30,000 miles so as to keep eye on the replace them as soon as it can be. Enough about the spark plugs lets answer the pig question how long will spark plugs last?

How long will spark plugs last?

Spark plugs are designed withstand a lot circumstances including heat to provide spark ignition in the combustion chamber. Spark plug can last as long as 1.5 to 2.5 years this all depends on mode of vehicular usage.

When your engine is functioning correctly, spark plugs should last between 20,000 and 30,000 miles. The U.S. Federal Highway Administration clocks Americans’ average annual mileage at 13,476.

Break this down into spark-plug life expectancy, and it comes to between 1.5 and 2.25 years. Spark plugs should be replaced as quick as possible if noticed to be sooty or already worn out.

Read Also 

Symptoms of failing spark plugs

  1. Rough idling                                                                                                                                                                                                                                              When spark plug is failing, it fails to deliver the proper amount of spark needed to ignite the air and fuel in the combustion chamber thereby leading to an incomplete combustion. An inconsistent combustion will lead to a rough idling engine.
  2. Difficulty in starting                                                                                                                                                                                                                                    When starting the car, the ignition switch sends signal to the start motor to crank the engine. When the engine turns the spark plugs will then ignite sparks that will ignite the air and fuel in the combustion chamber which generate energy to keep the engine running.                                                                                                                    A failing or a bad spark plug would not be able to generate the right amount of spark needed to ignite the air and fuel to burn and keep the engine running. When spark plugs fail, they are covered in black sooty which prevents the diode from igniting a spark.
  3. Reduced acceleration power                                                                                                                                                                                                                        Few other components affect the acceleration. You may lose up to 40% of your acceleration power. When your vehicle loses its acceleration power, you tend to use more fuel as well.
  4. Engine knock                                                                                                                                                                                                                                            This one is a severe case, and if left unaddressed may lead to significant mechanical damage. You risk damaging the following engine components.                                                                                                                                                                      Piston head. After an engine knock soon follows the piston head. If the intensity of the knock is immense, it may perforate the piston’s head. Piston compression rings.                                                                                                                                             Though not as damaging as losing a piston head, this will still need a comprehensive engine repair. Other signs and symptoms of a failing spark plugs includes a backfiring Engine, poor fuel economy and a misfiring engine.

Can I replace my own spark plugs?

Yes and no you can and cannot replace your car’s spark plugs all by yourself. Some engines are designed with spark plug compartment being hard to access.

Typical example is the v-6 engine, some of the old models of this engine are poor designed in a way that you will have to remove the portions of the intake manifold to replace the park plugs.

But if your engine affords easy access to the rear bank, you can probably do the job yourself. Just be sure you gap the spark plugs properly and use a torque wrench.

Can you drive with faulty spark plugs?

Can you drive with faulty spark plugs, yes you can drive with faulty plugs with a but. Faulty spark plugs can affect the overall engine performance and cause a significant increase in horsepower.

When plugs are faulty they tend not to create enough spark to ignite the fuel and air in the combustion chamber. If fuel is not completely burnt, it can cause the car shake, engine performance too will definitely be affected.

A fouled or bad spark plug is a plug that has become covered with a substance like oil, fuel or carbon or one that is blistered from running too hot. Driving with fouled or bad spark plugs can cause a host of problems for your engine.

What are the benefits of changing spark plugs?

Spark plugs are responsible for igniting the air/fuel mixture, creating the explosion which makes your engine produce power. These small electrical devices create an arc of electricity across two leads which are not touching, but close enough together that electricity can jump the gap between them.

The benefits of changing spark plugs includes increase in overall engine performance. Below is list of the benefits included

  • Better combustion
  • Improve fuel efficiency
  • Consistent combustion
  • Enjoyable drive comfort
  • Smooth running engine

This article talks about how often do you need to change spark plugs. If you have any questions please ask us using the comment section. Below are sample of questions others are asking

People also ask

  • What are the symptoms of bad spark plugs?
  • How long do spark plugs typically last?
  • How often should you change spark plugs?
  • How do I know if my spark plugs need changing?
  • What happens if I don’t change my spark plugs?
  • Does upgrading spark plugs make a difference?
  • How much does it cost to change your spark plugs?
  • Should I replace ignition coils with spark plugs?
  • Do you have to replace all spark plugs at once?
  • Why is it so expensive to replace spark plugs?
  • Do New spark plugs improve performance?
  • How long does it take a mechanic to change spark plugs?
  • Can I replace my own spark plugs?
  • How much should it cost to replace spark plugs and coils?
  • How much should a tune up cost?
  • What is included in a full tune up?
  • What are the signs that your car needs a tune up?
  • Does Walmart do tune ups?

Leave a Comment