What Is The Most Common Cause Of A Misfire?

What Is The Most Common Cause Of A Misfire? The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks. How do you fix a misfire? Inspect the spark plugs for signs of damage. Use a spark plug socket to