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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to ensure safety while performing electrical checks.

2. Inspect and Replace Air Filter

• Remove the air filter housing cover using the appropriate socket set.
• Take out the old air filter and inspect it for dirt and blockages.
• Install a new air filter that meets OEM specifications.
• Reattach the air filter housing cover and secure it.

3. Check and Replace Spark Plugs

• Remove the ignition coils using a socket wrench and inspect for damage.
• Pull out the spark plugs using a spark plug socket; check for wear or carbon buildup.
• Replace with new spark plugs according to OEM specifications (torque to manufacturer’s specifications).
• Reinstall the ignition coils and secure them properly.

4. Fuel System Inspection

• Connect a fuel pressure gauge to the fuel rail service port.
• Turn the ignition on (do not start the engine) and check the pressure reading.
• If pressure is low, inspect the fuel pump and fuel filter for faults; replace the fuel filter if needed.
• If replacing the fuel pump, access it through the fuel tank, disconnect the lines, and install a new pump according to the manufacturer’s guidelines.

5. Test Throttle Position Sensor

• Locate the throttle body and disconnect the TPS connector.
• Use a multimeter to test the voltage output while manually moving the throttle plate.
• If readings are outside specifications, replace the TPS with a new part.