my Volkswagen Golf MK7 (2015-2019) has a loss of acceleration, what should I do?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent any electrical issues.

2. Inspect and Replace Air Filter

• Remove the air filter housing cover using a screwdriver.
• Take out the existing air filter and inspect it for dirt and debris.
• Install a new air filter, ensuring it is seated correctly.
• Reattach the air filter housing cover.

3. Fuel System Inspection and Cleaning

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position (do not start the engine) to check the fuel pressure.
• If the pressure is low, inspect the fuel pump and filter; replace if necessary.
• If injectors are clogged, use a fuel injector cleaner according to the manufacturer's instructions or remove and clean the injectors manually.

4. Throttle Position Sensor (TPS) Testing

• Locate the TPS on the throttle body.
• Disconnect the electrical connector and use a multimeter to measure the voltage output while moving the throttle plate.
• If readings are inconsistent or outside the specified range, replace the TPS.

5. Mass Airflow Sensor (MAF) Cleaning

• Remove the MAF sensor from the air intake duct.
• Use MAF cleaner spray to clean the sensor elements. Do not touch them with fingers or tools.
• Reinstall the MAF sensor securely.