my Skoda Octavia has a rough idle when I start it in the morning why

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

• Remove the spark plug wires or ignition coils.
• Use a spark plug socket to unscrew and remove old spark plugs.
• Inspect the spark plugs for wear or fouling before replacing them with new ones.
• Torque new spark plugs to the manufacturer’s specification (typically around 15-20 lb-ft).
• Reinstall the ignition coils or spark plug wires securely.

3. Clean Throttle Body

• Remove the air intake duct to access the throttle body.
• Use throttle body cleaner and a soft cloth to carefully clean the throttle plate and surrounding area.
• Reinstall the air intake duct securely.

4. Test and Replace Engine Coolant Temperature Sensor

• Locate the engine coolant temperature sensor (usually near the thermostat housing).
• Disconnect the electrical connector and remove the sensor using a socket wrench.
• Install a new sensor, ensuring it is tightened to the manufacturer's specifications.
• Reconnect the electrical connector.

5. Reconnect Battery and Start Engine

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature, monitoring for any rough idle or warning lights.