Back to all

Plugging Away (Spark Plug Replacement)

November 6, 2022

If you drive a vehicle with a gasoline engine, thank the spark plugs for igniting the gasoline/air mixture in each cylinder that keeps your vehicle traveling smoothly down the road every day.  Your spark plugs work hard, firing thousands of times in a well-choreographed order, and you usually don't pay much attention to them until one of them stops working the way it should.

Signs that spark plugs are wearing out include:

  • Engine runs more roughly than it did
  • Vehicle doesn't start as easily as it used to
  • Vehicle hesitates when you press on the accelerator
  • Your fuel economy has gotten worse

When a spark plug stops working altogether, you will find your engine has likely lost a lot of its power and isn't running smoothly.  Your Check Engine light may  come on.  Then it's time to head to come to our service center to have it diagnosed.

If your plugs need to be replaced, they're usually done all at the same time. And if your vehicle has spark plug wires, experts recommend you change them as well. Different type of spark plugs last longer than others, and your service advisor can discuss what's best for your vehicle and driving habits.

A technician will also determine if there are any carbon deposits on your plugs, how healthy the ignition coil is (it's the part that supplies the high-voltage jolt that makes the spark) and will look for other signs and symptoms that may point to other problems in your engine. For instance, if a spark plug is fouled by oily deposits, it's possible oil is getting into the combustion chamber. 

They will also check all the plugs to see if there are problems in just one or all cylinders.  Sometimes a technician will find a plug that has overheated, literally melting the metal.  In that case, they may recommend they correct that problem before replacing the spark plugs.

Most spark plugs will last for a good, long time.  Even if you aren't seeing any symptoms they're wearing out, make sure you have your service advisor check your vehicle manufacturer's recommended maintenance intervals.  Preventative maintenance will keep your vehicle running reliably so you can count on it to get you where you want to go. 

Tuffy Pelham
3422 Pelham Parkway
Pelham, Alabama 35124
205-624-2190
https://www.tuffypelham.com/

Need Service?

Request a Quote

More articles from Tuffy Pelham

That Squeal is Telling You Something (What Causes Squealing While Steering)

April 20, 2025

If you hear a squealing noise when you turn your vehicle, it's trying to tell you something is wrong. After all, it never made that noise before, right? The sound you hear may becoming from a few sources. Let's take a look (or a listen) to some of the possibilities. First, you almost certainl... More

Not So Hot in Pelham

April 13, 2025

When the weather turns cold, it's nice to crank up the furnace and enjoy the heat. But if your home's furnace doesn't work, it's not too comfortable. Same goes with your vehicle. When the heater's not working, things can get miserable. It could also signal some major problems, which we'll discuss... More

Power Failure (Broken Power Seat)

April 6, 2025

Know anyone who doesn't love a power seat in an SUV, a car, truck or van? They're convenient and precise in their adjustments. But when they break, oh, what a pain. Not only is it inconvenient, it may leave your seat position too close to the steering wheel or too far from the pedals. This is ... More