how to troubleshoot stalling issues in my Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather the necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool before starting work.

2. Clear Error Codes

• Use the OBD-II scanner to clear any stored error codes after diagnostics.
• Start the engine to see if any codes reappear.

3. Inspect and Replace Fuel Filter

• Tools Required: Socket set, fuel line disconnect tool.
• Sub-steps:
  1. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
  2. Locate and disconnect the fuel lines from the fuel filter.
  3. Remove the old fuel filter using the socket set.
  4. Install the new fuel filter in the correct orientation, making sure it is secure.
  5. Reconnect the fuel lines and replace the fuel pump fuse.

4. Clean Throttle Body

• Tools Required: Throttle body cleaner, soft cloth, socket set.
• Sub-steps:
  1. Disconnect the negative battery terminal to prevent electrical issues.
  2. Remove the intake hose connected to the throttle body.
  3. Spray throttle body cleaner into the throttle body and wipe with a soft cloth to remove carbon buildup.
  4. Reconnect the intake hose and the negative battery terminal.

5. Replace Spark Plugs and Ignition Coils

• Tools Required: Socket set, torque wrench.
• Sub-steps:
  1. Remove the engine cover if necessary to access the ignition coils.
  2. Disconnect the electrical connectors from the ignition coils.
  3. Remove the ignition coils using the socket set.
  4. Replace the spark plugs using the torque wrench to the manufacturer’s specified torque (typically around 20 Nm).
  5. Install the new ignition coils and reconnect electrical connectors.

6. Check and Replace Thermostat if Necessary

• Tools Required: Socket set, coolant catch pan.
• Sub-steps:
  1. Drain the coolant from the radiator using the catch pan.
  2. Remove the thermostat housing and replace the thermostat with a new one.
  3. Reinstall the thermostat housing and refill the cooling system with the appropriate coolant type.