how to fix my Volkswagen Golf MK5 (2004-2008) if it stalls when coming to a stop

Solution

1. Preparation

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

2. Clean the Throttle Body

• Tools Required: Throttle body cleaner, soft brush, rags.
• Remove the air intake duct leading to the throttle body.
• Use throttle body cleaner and a soft brush to clean the throttle plate and surrounding areas.
• Wipe away any residue with a clean rag.
• Reattach the air intake duct securely.

3. Replace the Fuel Filter

• Tools Required: Socket set, fuel line removal tool, replacement fuel filter.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the negative battery terminal.
• Use a fuel line removal tool to disconnect fuel lines from the filter.
• Remove the old fuel filter and install the new one, ensuring correct orientation.
• Reconnect the fuel lines and battery terminal.

4. Clean or Replace Idle Air Control Valve

• Tools Required: Socket set, throttle body cleaner.
• Locate the idle air control valve (IACV) on the throttle body.
• Remove the IACV from its mounting.
• Clean the valve using throttle body cleaner, or replace it if it’s faulty.
• Reinstall the IACV, ensuring it is properly seated.

5. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench, new spark plugs.
• Remove the ignition coils by unscrewing them from the engine.
• Use a spark plug socket to remove old spark plugs.
• Inspect spark plugs for wear and replace them if necessary.
• Install new spark plugs with the correct torque specification (usually around 15-20 Nm).
• Reinstall the ignition coils.