why does my Volkswagen Passat B8 (2015-2022) feel like it’s stalling

Solution

1. Preparation

• Tools Required: OBD-II scanner, fuel pressure gauge, socket set, multimeter, basic hand tools.
• Disconnect the battery to ensure safety while working on electrical components.

2. Diagnose and Address Fault Codes

• Use the OBD-II scanner to read any error codes.
• Note the codes and clear them before conducting further tests.
• If codes are present, research their meanings to direct the repair efforts.

3. Inspect and Replace Air Filter

• Remove the air filter housing cover using a socket set.
• Take out the old air filter and inspect it for dirt and damage.
• Replace with a new air filter if necessary, ensuring it fits snugly in the housing.

4. Test and Replace Fuel Pump (if necessary)

• Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position without starting the engine.
• Check the fuel pressure reading against manufacturer specifications.
• If the pressure is below specifications, replace the fuel pump:
  1. Disconnect the battery.
  2. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
  3. Remove any necessary components to access the fuel pump.
  4. Disconnect fuel lines and electrical connectors from the old pump.
  5. Install the new pump, reconnecting all lines and electrical connections.

5. Inspect and Replace Ignition Components

• Remove spark plugs using a socket set and inspect for wear or carbon buildup.
• Replace any worn spark plugs with new ones, ensuring the correct gap.
• Check ignition coils for proper function using a multimeter; replace any faulty coils.