- Spark plug: A worn or damaged spark plug can cause the cylinder to misfire, especially at high speeds when there is high demand on the ignition system.
- Spark plug wire: A loose or damaged spark plug wire can also cause the cylinder to misfire.
- Ignition coil: A faulty ignition coil can prevent the cylinder from getting the necessary spark to ignite the fuel.
- Fuel injector: A clogged or dirty fuel injector can prevent the cylinder from getting the necessary fuel to combust.
- Valve clearance: Incorrect valve clearance can cause the cylinder to not get enough air or fuel, leading to a misfire.
- Vacuum leak: A vacuum leak can cause the cylinder to run lean, leading to a misfire.
- Bad Gas: Bad or stale fuel can cause the cylinder to misfire especially during hard acceleration where more fuel is required.