why does my Volkswagen Passat B8 (2015-2022) have poor acceleration?

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to ensure safety during repairs.
• Ensure the vehicle is parked on a level surface.

2. Inspect and Replace Air Filter

• Remove the air filter housing cover with a socket set.
• Take out the old air filter and inspect for debris and restrictions.
• Install a new, clean air filter (OEM or equivalent).
• Reassemble the air filter housing and secure it.

3. Check and Replace Fuel Filter

• Locate the fuel filter (usually in-line with the fuel line).
• Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
• Disconnect the fuel lines from the filter using appropriate wrenches.
• Install the new fuel filter, ensuring the flow direction is correct.
• Reconnect the fuel lines and replace the fuel pump fuse.

4. Clean Throttle Body

• Remove the throttle body from the intake manifold using a socket set.
• Spray throttle body cleaner onto the throttle plate and inside the body.
• Use a clean cloth to wipe away carbon deposits.
• Reinstall the throttle body and reconnect the electrical connector.

5. Replace Spark Plugs and Coils (if necessary)

• Remove the ignition coil cover using a socket set.
• Disconnect the ignition coil connectors and remove the coils.
• Unscrew the old spark plugs using a spark plug socket.
• Install new spark plugs, tightening to manufacturer specifications (usually around 18-22 lb-ft).
• Reinstall ignition coils and reconnect the connectors.