ignition system maintenance

When to Replace Spark Plugs: Mileage Intervals by Vehicle Type

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When to Replace Spark Plugs: Mileage Intervals by Vehicle Type

In 15 years as an ASE Master Tech, I’ve seen 70% of premature ignition failures trace back to ignoring spark plug replacement beyond OEM-recommended intervals—especially in turbocharged direct-injection engines where carbon buildup accelerates electrode erosion. Copper plugs in a 2008 Ford F-150 might last 30,000 miles, but iridium units in a 2023 Toyota Camry can … Read more

Spark Plug Problems: How to Identify Bad Plugs

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Spark Plug Problems: How to Identify Bad Plugs

Quick Answer: Bad spark plugs cause misfires, rough idling, and poor fuel economy. Check for electrode wear, carbon buildup, or oil contamination. Replace every 30,000-100,000 miles depending on plug type (copper/platinum/iridium). DIY replacement costs $20-$80; professional service runs $150-$300. The $47 Lesson That Changed My Career It was 6:47 AM on a freezing February Tuesday back … Read more