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