how to inspect and replace spark plugs in Honda Accord 9th Generation (2013-2017)

Honda Accord 10th Generation (2018-2022)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

4 min read

641 words

Problem Statement

Learn how to inspect and replace spark plugs in a 2013-2017 Honda Accord. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before starting any work.

Symptoms

•Engine misfires or rough idling
•Difficulty starting the engine
•Poor fuel economy
•Illuminated check engine light
•Increased emissions
•Engine hesitation during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any misfire codes.
2
Inspect the engine bay for visible damage or corrosion around the ignition components.
3
Check the condition of the spark plug wires for wear or damage.
4
Remove a spark plug to visually inspect its condition for signs of wear, fouling, or carbon buildup.
5
Measure the gap of the spark plug using a feeler gauge to ensure it meets manufacturer specifications.
6
Inspect the ignition coils for proper function and signs of wear.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set (10mm and 5/8" sockets)
•Torque wrench
•Spark plug gap tool
•Ratchet and extension
•Pliers
•Compressed air (optional)

Parts Required

•New spark plugs (OEM recommended)
•Ignition coil boots (if damaged)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any misfire codes.
2
Inspect the engine bay for visible damage or corrosion around the ignition components.
3
Check the condition of the spark plug wires for wear or damage.
4
Remove a spark plug to visually inspect its condition for signs of wear, fouling, or carbon buildup.
5
Measure the gap of the spark plug using a feeler gauge to ensure it meets manufacturer specifications.
6
Inspect the ignition coils for proper function and signs of wear.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the engine is cool to prevent burns.
Disconnect the negative battery terminal to avoid electrical shorts.

Tools Required:

Socket set (10mm and 5/8" sockets)
Torque wrench
Spark plug gap tool
Ratchet and extension
Pliers
Compressed air (optional)

2. Remove Engine Cover (if applicable)

Use a socket to remove the bolts securing the engine cover.
Carefully lift the engine cover off and set it aside.

3. Remove Ignition Coils

Disconnect the electrical connectors from each ignition coil.
Remove the bolts securing the coils using a socket.
Gently pull the ignition coils straight out of the spark plug wells.

4. Remove Spark Plugs

Using a spark plug socket and ratchet, carefully loosen and remove each spark plug by turning it counterclockwise.
If necessary, use compressed air to blow out any debris from the spark plug wells before removing the plugs.

5. Inspect and Replace Spark Plugs

Examine the removed spark plugs for wear patterns, carbon deposits, and electrode condition.
If replacement is needed, check the gap on the new spark plugs using a feeler gauge, adjusting as necessary to meet the manufacturer’s specification (typically around 0.043 inches for Honda).
Install the new spark plugs by hand to avoid cross-threading, then tighten with the socket until snug, followed by a torque wrench to the specified torque (usually around 13 lb-ft).

6. Reinstall Ignition Coils

Insert the ignition coils back into their respective positions.
Secure them with the bolts and reconnect the electrical connectors.

7. Reinstall Engine Cover (if applicable)

Place the engine cover back onto its mounting points.
Secure it with the previously removed bolts.

8. Reconnect Battery

Reconnect the negative battery terminal and ensure it is tight.