my Volkswagen Golf MK7 (2015-2019) has poor acceleration what's going on

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool completely before starting any work.

2. Air Filter Replacement

• Tools Required: Socket set, flat-head screwdriver
• Remove the air filter housing cover by loosening the screws or clips.
• Take out the old air filter and inspect the housing for debris.
• Install the new air filter, ensuring it fits snugly.
• Reassemble the air filter housing cover and tighten securely.

3. Fuel System Inspection

• Tools Required: Fuel pressure gauge, socket set
• Locate the fuel rail and connect the fuel pressure gauge.
• Turn the ignition key to the "ON" position (do not start the engine) to check pressure.
• If pressure is below specifications, inspect the fuel pump and fuel filter for issues.
• Replace the fuel filter if clogged and consider replacing the fuel pump if faulty.

4. Ignition System Maintenance

• Tools Required: Spark plug socket, torque wrench, multimeter
• Remove the spark plug wires and take out the spark plugs.
• Inspect the plugs for signs of wear or carbon buildup; replace if necessary.
• Check ignition coils using a multimeter for proper resistance.
• Reinstall the new or cleaned spark plugs at the manufacturer's specified torque setting.

5. Throttle Body Cleaning

• Tools Required: Throttle body cleaner, soft cloth, screwdriver
• Remove the intake duct to access the throttle body.
• Spray throttle body cleaner onto a soft cloth and wipe the throttle plate and walls.
• Ensure the throttle plate moves freely and is free of carbon buildup.
• Reassemble the intake duct securely.

6. MAF Sensor Testing

• Tools Required: Multimeter
• Disconnect the MAF sensor electrical connector.
• Use a multimeter to check the sensor's voltage output while the engine is running.
• If the voltage is outside the manufacturer's specifications, replace the MAF sensor.