Spark Plug Replacement

Spark plugs ignite the air-fuel mixture in every cylinder, thousands of times per minute. As they wear, the gap widens and the spark weakens, which leads to incomplete combustion. You may notice:

• A rough or shaky idle
• Hesitation or stumbling under acceleration
• Hard starting, especially on cold mornings
• A gradual drop in fuel economy
• A check engine light for a misfire

Most modern vehicles use long-life iridium or platinum plugs designed to last 60,000 to 120,000 miles, but driving conditions, engine design, and problems like oil or coolant leaks can shorten their life. Turbocharged and direct-injection engines are often harder on plugs.

Our ASE-certified technicians start with a diagnosis to confirm the plugs are the problem and not an ignition coil, fuel injector, or vacuum leak. During replacement, we install the correct plug type and gap for your engine, torque each plug to specification, and inspect ignition coils and boots. We also read the old plugs, since their condition can reveal other engine problems such as oil burning or a rich fuel mixture.

Real Experiences. Real Trust.

On many engines, especially V6 models with rear plugs tucked under the intake manifold, spark plug replacement is more involved than it sounds. Our technicians, including ASE Master Technicians with more than 65 years of combined experience, know the shortcuts to avoid and the details that matter, from proper torque to protecting the threads in aluminum cylinder heads.

Every spark plug service includes a digital multi-point inspection. Photos and technician notes arrive on your phone, giving you a clear picture of your engine's condition and anything else that may need attention soon.

Qualifying repairs are backed by a 36-month/36,000-mile warranty honored nationwide through our NAPA AutoCare Center affiliation, and Santi Auto Care is family owned and NAPA Gold Certified. Book online, use our after-hours drop-off, and stay informed with text updates while we work. Prefer to wait? Our lounge offers free WiFi, coffee, sodas, and snacks. Military members and first responders save 10% on parts and labor.

Making Auto Care Easy and Stress-Free