what causes my Volkswagen Golf MK6 (2009-2014) to stall while driving?

Solution

1. Preparation

• Gather tools and parts required for repairs.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to ensure safety during electrical component inspection.

2. Fuel System Inspection

• Sub-steps:
  • Remove the fuel pump relay from the fuse box.
  • Attach a fuel pressure gauge to the fuel rail test port.
  • Reconnect the battery and turn the ignition to the ON position (do not start the engine) to check fuel pressure.
  • If pressure is below specifications (typically 50-60 psi for Golf MK6), replace the fuel pump.
• Tools Required: Fuel pressure gauge, socket set.

3. Ignition System Check

• Sub-steps:
  • Remove spark plugs using a socket wrench.
  • Inspect plugs for wear, carbon buildup, or damage; replace if necessary.
  • Test ignition coils with a multimeter for proper resistance; replace any faulty coils.
• Tools Required: Socket set, multimeter.

4. Throttle Position Sensor and MAF Testing

• Sub-steps:
  • Locate the throttle position sensor and disconnect its electrical connector.
  • Use a multimeter to measure the resistance across the sensor terminals while slowly opening and closing the throttle.
  • For MAF, disconnect and check voltage output according to manufacturer's specifications; replace if necessary.
• Tools Required: Multimeter.

5. Reassemble and Reconnect

• Sub-steps:
  • Reinstall any parts removed during inspection, ensuring all connections are secure.
  • Reconnect the battery.
• Tools Required: Socket set.