why does my Honda Accord run rough when I first start it?

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is on a level surface and the engine is cool.
• Disconnect the battery to avoid electrical issues.

2. Replace Spark Plugs

• Remove the ignition coil covers (if applicable).
• Disconnect the ignition coils and remove them from the spark plug tubes.
• Using a socket wrench, remove the old spark plugs.
• Install new spark plugs, ensuring they are properly gapped according to manufacturer specifications (typically 0.044 inches for most Honda Accords).
• Reinstall the ignition coils and covers.

3. Check and Replace Fuel Filter

• Locate the fuel filter; it may be near the fuel tank or under the hood.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel lines from the filter (use caution as fuel may spill).
• Remove the old fuel filter and install the new one, ensuring the flow direction is correct.
• Reconnect the fuel lines and replace the fuel pump fuse.

4. Clean or Replace Air Filter

• Open the air intake housing and remove the air filter.
• Inspect the air filter for dirt and debris; replace if necessary.
• Clean the air intake housing with a damp cloth before reinstalling the new air filter.

5. Test Coolant Temperature Sensor

• Locate the coolant temperature sensor (usually near the thermostat housing).
• Disconnect the electrical connector and remove the sensor.
• Test the sensor's resistance with a multimeter according to specifications (check service manual).
• Replace the sensor if it is outside the specified range.