Spark plugs are small but essential components in your engine. They ignite the air-fuel mixture in each cylinder, creating the power your vehicle needs to run. Without healthy spark plugs, your engine can misfire, lose power, or waste fuel.
Knowing when to replace them is important for keeping your car performing at its best and avoiding unnecessary repairs.
What Spark Plugs Do
Each time you start your car, spark plugs fire thousands of times per minute while you drive. This constant activity creates heat and pressure inside the combustion chamber. Over time, the tips of the plugs wear down, their gap can widen, and deposits may build up on the electrodes.
When plugs wear out, the ignition system has to work harder to produce a spark, which can reduce engine efficiency and reliability.
Signs Your Spark Plugs May Need Replacement
Spark plugs wear gradually, so problems may start subtly. Watch for:
- Rough idling or engine misfires.
- Sluggish acceleration.
- Difficulty starting the engine.
- Poor fuel economy.
- Check engine light related to misfire codes.
Even if your car still runs, these symptoms mean your plugs may not be firing as efficiently as they should.
How Often to Replace Them
Replacement intervals depend on the type of spark plug your vehicle uses:
- Copper spark plugs generally last about 20,000 to 30,000 miles.
- Platinum spark plugs can last 60,000 miles or more.
- Iridium spark plugs may last up to 100,000 miles.
Your vehicle’s owner’s manual will list the exact interval recommended for your specific make and model.
Why You Should Not Wait Too Long
Worn spark plugs can cause your ignition coils or wires to work harder, potentially leading to their premature failure. They can also cause incomplete combustion, which wastes fuel and increases emissions.
In some cases, ignoring worn plugs can even damage the catalytic converter, one of the most expensive components in your exhaust system.
Other Maintenance to Consider at the Same Time
Replacing spark plugs is a good time to inspect related components such as ignition coils, wires, and boots. If these parts are worn or damaged, replacing them together ensures the ignition system works efficiently and helps you avoid multiple repair visits.
Many shops will also inspect the condition of your air filter and fuel system during this service, as these components can impact combustion quality.
Can You Replace Spark Plugs Yourself
While replacing spark plugs is a manageable DIY job for some vehicles, many modern engines have them located deep inside the engine bay or under covers and intake components. Accessing them may require special tools or procedures.
If your car is under warranty, or if you want to ensure proper installation and torque, having the work done by a professional technician is the safest choice.
Spark Plug Service at Proper Service of Baldwin Place in Baldwin Place & Croton Falls, NY
Replacing spark plugs on schedule ensures your engine starts easily, runs smoothly, and performs efficiently. At Proper Service of Baldwin Place, we inspect and replace spark plugs using high-quality parts specifically designed for your vehicle. Whether your car is due for routine maintenance or showing signs of ignition trouble, our team can keep it running at its best.
Schedule your spark plug service today and enjoy smooth, reliable performance every time you drive.
