How to Fix a Cigarette Lighter Socket That Doesn't Work To get your cigarette lighter socket working again, you need to check and rule out each potential issue.

You can, and should, actually read your spark plugs for valuable "clues" about how your engine is operating.

How Often Do You Need To Change Spark Plugs? On average, spark plugs should be changed every 30,000 miles, but that could fall between 20,000-40,000 depending on the vehicle.