why does my Skoda Octavia's engine stall when idling

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Clean or Replace the Idle Air Control Valve (IAC)

• Remove the IAC valve from the intake manifold.
  • Tools: Socket set, ratchet.
• Clean the IAC valve with throttle body cleaner.
• If the valve is faulty, replace it with a new one.
• Reinstall the IAC valve and reconnect the electrical connector.

3. Inspect and Clean the Throttle Body

• Remove the air intake duct leading to the throttle body.
  • Tools: Screwdriver, socket set.
• Clean the throttle body using throttle body cleaner and a soft cloth.
• Ensure the throttle plate moves freely without obstruction.
• Reattach the air intake duct securely.

4. Test Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
  • Tools: Fuel pressure gauge.
• Turn the ignition to the "ON" position without starting the engine to check pressure.
• Compare reading with manufacturer specifications; replace the fuel pump if pressure is low.

5. Check and Replace Spark Plugs (if necessary)

• Remove the spark plug wires and the spark plugs.
  • Tools: Spark plug socket, ratchet.
• Inspect spark plugs for wear or deposits; replace if necessary.
• Reinstall new or cleaned spark plugs and reconnect the wires.