my Volkswagen Golf MK7 (2015-2019) is stalling at stoplights what's wrong

Solution

1. Preparation

• Gather tools and safety equipment.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.

2. Inspect and Replace Spark Plugs

• Remove the ignition coils by unscrewing the retaining bolts and disconnecting the electrical connectors.
• Extract the spark plugs using a spark plug socket.
• Inspect spark plugs for wear; replace with OEM-equivalent spark plugs if necessary (specification: NGK PZFR6F-11).
• Reinstall coils and reconnect electrical connectors.

3. Fuel System Check

• Use a fuel pressure gauge to check the fuel pressure at the fuel rail. It should be within the manufacturer's specifications (typically around 50-60 psi for the MK7).
• If pressure is low, inspect and potentially replace the fuel filter and fuel pump.
• Ensure all fuel lines are secure and free from leaks.

4. Air Intake System Cleaning

• Remove the air intake hose connected to the throttle body.
• Clean the throttle body using throttle body cleaner and a soft cloth to remove carbon deposits.
• Reinstall the air intake hose and ensure it is tight.

5. Throttle Body Reset

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle for a few minutes to enable the throttle body to recalibrate.