why does my Honda Accord 8th Generation (2008-2012) engine misfire at stoplights

Learn how to diagnose and fix engine misfire issues in Honda Accord 2008-2012. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Replace Spark Plugs

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the ignition coil cover (if applicable) by unscrewing any retaining bolts.
• Disconnect the ignition coil connectors and remove the coils.
• Use a spark plug socket to carefully remove the old spark plugs.
• Inspect the spark plug threads and clean if necessary.
• Install new spark plugs, ensuring they are gapped correctly to manufacturer specifications (typically around 0.044 inches for most Honda models).
• Torque the spark plugs to the specified value (usually around 13-16 lb-ft).

3. Inspect and Replace Ignition Coils (if necessary)

• Tools Required: Ratchet, socket set
• If ignition coils are faulty, remove them from the engine by unscrewing the retaining bolts.
• Compare the old coils with new ones to ensure compatibility.
• Install the new ignition coils, ensuring they are seated correctly.
• Reconnect the coil connectors and replace any covers.

4. Clean or Replace Fuel Injectors

• Tools Required: Fuel injector cleaning kit or replacement injectors
• Remove the fuel rail, disconnecting fuel lines and electrical connectors carefully to avoid damage.
• If cleaning, follow the injector cleaning kit's instructions; if replacing, install new injectors by aligning them properly within the rail.
• Reattach the fuel rail and ensure all connections are secure.

5. Check and Replace Air Filter (if necessary)

• Tools Required: None, or a screwdriver if the air filter box is secured
• Open the air filter housing and inspect the air filter condition.
• If dirty or clogged, replace it with a new one.