Is your Ford Focus engine have a rough idling, engine misfiring, and the check engine light on due to a faulty spark plug/ignition coil? Learn how to fix the problem by replacing the spark plug and ignition coil of your Ford Focus. This guide provides instructions on replacing spark plugs on a Ford Focus.

What you will need

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  • Ford focus sparkplugs


  • Small flat-head screwdriver
  • 10 mm socket
  • Ratchet or power tool
  • Sparkplug socket


  1. Put the vehicle in park.
  2. Wait for the engine to cool down.
  3. Open the hood.
  4. Remove ignition coil electrical connectors by using a small screwdriver to unlock the connectors.remove-connectors
  5. Loosen and remove 10 mm bolts that hold ignition coils in place.remove-bolts
  6. Pull out the ignition coils.pull-coils
  7. Remove the spark plugs using a spark plug socket.remove-spark=plugssparkplugs-removed
  8. Install and tighten the new spark plugs using a spark plug socket.install-spark-plugs
  9. Reinstall the ignition coils.reinstall-coils
  10. Install and fasten 10mm coil retaining bolts.reinstall-bolts
  11. Reconnect electrical connectors.reconnect-connectors

Torque Specifications

  • Spark Plugs: 11 ft/lbs

Check Engine Light Still On


If the check engine light is still on after you have replaced the spark plugs and ignition coils, use the YOUCANIC Full System Scanner to clear the stored codes. This scanner also can read and clear fault codes through every vehicle’s control module.

Frequently Asked Questions

What is the lifespan of Ford Focus Spark Plugs?

It is recommended to replace spark plugs every 100,000 miles.

Is it necessary to re-gap the spark plugs before installation?

Before installation, most spark plugs are pre-gapped; however, checking the gap against the manufacturer’s specifications is recommended.

How to adjust the gap of a sparkplug?

You can adjust the gap of a spark plug by using a feeler gauge and a plier. You have to measure the gap while adjusting it using a plier.

We hope you find the Ford Focus 2.0 Spark Plug & Ignition Coil Replacement guide helpful. Check these troubleshooting and repair guides for more help on your Ford.

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