The Importance of Replacing Your Spark Plugs

Your vehicle’s engine relies on many critical components to run smoothly, and spark plugs are among the most essential. They provide the ignition spark that starts combustion, powering your vehicle efficiently. Over time, spark plugs wear out, causing performance issues and reduced fuel economy. At A&A The Shop, we’ve seen how neglected spark plugs can lead to bigger engine problems, so let’s dive into why timely replacement is so important.

What Do Spark Plugs Do?

Spark plugs ignite the air-fuel mixture in the engine’s combustion chamber, creating the controlled explosion that powers your car. Without properly functioning spark plugs, your vehicle may struggle with ignition, acceleration, and overall performance.

Signs That Your Spark Plugs Need Replacing

If your spark plugs are worn or failing, you may notice these symptoms: 

• Rough Idling – Your engine may vibrate or sound uneven at idle. 
• Slow or Hard Starting – A weak spark can make starting your vehicle difficult.
• Reduced Fuel Efficiency – Worn spark plugs cause incomplete combustion, wasting fuel.
• Loss of Power & Acceleration – Your engine may feel sluggish when you press the gas.
• Engine Misfires – A failing spark plug can cause hesitation or jerky performance.
• Check Engine Light – In modern vehicles, bad spark plugs can trigger diagnostic trouble codes.

How Often Should You Replace Spark Plugs?

Replacement intervals vary depending on your vehicle and the type of spark plug used:

• Copper Spark Plugs – Typically last 20,000–30,000 miles.
• Platinum Spark Plugs – Can last 50,000–60,000 miles.
• Iridium Spark Plugs – Offer the longest lifespan, often 80,000–100,000 miles.

Subaru models, for example, often require high-performance iridium plugs, which last longer but should still be replaced before reaching 100,000 miles to maintain optimal engine performance.

Why Timely Spark Plug Replacement Matters

Replacing your spark plugs at the recommended interval helps:

• Improve Fuel Economy – New plugs ensure complete combustion, maximizing efficiency.
• Restore Engine Performance – Fresh spark plugs provide consistent ignition and power.
• Reduce Emissions – Proper combustion lowers unburned fuel emissions.
• Prevent Costly Repairs – Delaying replacement can lead to carbon buildup, ignition coil failure, or catalytic converter damage.
• Enhance Reliability – A well-maintained ignition system prevents breakdowns and cold-start issues.

Professional Spark Plug Replacement at A&A The Shop

At A&A The Shop, we specialize in Subaru and Toyota maintenance, ensuring your spark plugs are replaced with high-quality OEM or better components. Our experienced technicians will:

• Inspect your spark plugs for wear and deposits
• Use the correct spark plug type for your engine
• Check ignition coils and related components
• Ensure proper gap and torque settings for longevity

Schedule Your Spark Plug Service Today

If your vehicle is experiencing performance issues, it may be time to replace the spark plugs. Avoid costly engine repairs by scheduling a spark plug inspection and replacement at A&A The Shop.

Visit us at 4617 Old Seward Hwy, Anchorage, AK Call us at 907-562-3919 to book an appointment.

Let us help keep your engine running at its best with a professional spark plug replacement service!