What are Spark Plugs and How Do They Work?
Spark plugs are small but essential components of your vehicle’s ignition system. They create the spark that ignites the air-fuel mixture inside the engine’s cylinders, powering your vehicle. Properly functioning spark plugs ensure efficient combustion, smooth engine operation, and optimal fuel efficiency.
Each cylinder typically has its own spark plug, and modern engines may use multiple plugs per cylinder for enhanced performance.
Why Spark Plugs Matter
Worn or fouled spark plugs can lead to:
- Engine misfires or rough idling
- Decreased fuel efficiency
- Hard starting or stalling
- Reduced engine performance
Replacing old spark plugs restores smooth acceleration, better fuel economy, and reliable engine performance.
Important to Know:
- Spark plugs usually last 30,000–100,000 miles, depending on type (copper, platinum, or iridium).
- Replacing spark plugs on schedule prevents damage to the ignition system and catalytic converter.
- Modern engines often require gapped, manufacturer-specified spark plugs for optimal performance.
How Spark Plugs Replacement is Done:
- Inspect spark plugs and ignition components for wear or damage.
- Safely lift and support the vehicle if necessary for access.
- Remove the ignition coils or wires connected to the spark plugs.
- Carefully remove the old spark plugs using a torque wrench.
- Install new OEM-quality spark plugs, properly gapped and torqued.
- Reinstall ignition coils or wires.
- Start the engine and perform a test drive to ensure smooth operation.
When to Replace Spark Plugs:
- Every 30,000–100,000 miles, depending on spark plug type.
- If the engine misfires, idles roughly, or fuel efficiency drops.
- During routine tune-ups or maintenance schedules.
Signs You May Need Spark Plugs Replacement:
- Rough idle or engine misfires
- Difficulty starting the engine
- Reduced fuel efficiency
- Hesitation or loss of power during acceleration
- Check Engine Light illuminated
How Important is This Service?
Spark plugs are critical for engine efficiency, reliability, and smooth performance. At Nationwide Mechanics, we replace worn or faulty spark plugs with high-quality OEM parts, restoring optimal engine operation and improving fuel economy.
