what causes my Volkswagen Passat B8 (2015-2022) to stall while driving?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and securely supported.
• Disconnect the negative terminal of the battery to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Inspect the spark plugs for fouling or wear; replace if necessary (use OEM specifications).
  3. Check ignition coils for cracks or signs of failure; replace any faulty coils.
  4. Reinstall the engine cover and reconnect the battery terminal.

3. Fuel System Inspection

• Sub-steps:
  1. Locate the fuel pump fuse in the fuse box and check for continuity; replace if blown.
  2. Use a fuel pressure gauge to test the fuel pressure at the fuel rail; should meet manufacturer specifications.
  3. If fuel pressure is low, inspect fuel lines for leaks or kinks and replace the fuel filter if clogged.
  4. If the fuel pump is faulty, replace it following manufacturer guidelines.

4. Throttle Body and MAF Sensor Cleaning

• Sub-steps:
  1. Remove the air intake duct to access the throttle body.
  2. Use throttle body cleaner to clean the throttle plate and surrounding areas; avoid using abrasive materials.
  3. Disconnect the MAF sensor connector and carefully remove the sensor.
  4. Clean the MAF sensor with appropriate cleaner; avoid touching the sensing element.
  5. Reassemble all components securely.