why does my Volkswagen Golf MK7 (2015-2019) lose power when driving uphill

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Clean Air Intake

• Remove the air filter housing and inspect the air filter; replace if dirty.
• Clean the throttle body using throttle body cleaner and a soft cloth.
• Reassemble the air intake components securely.

3. Fuel System Inspection

• Disconnect the fuel pump relay and attach a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (without starting the engine) to check fuel pressure; it should meet manufacturer specifications (approximately 50-60 psi for most models).
• If pressure is low, check the fuel pump and fuel filter for proper operation and replace if necessary.

4. MAF Sensor Testing

• Remove the MAF sensor from the intake duct.
• Inspect for dirt or debris; clean with MAF cleaner.
• Reinstall the MAF sensor and check the electrical connector for secure connection.

5. Ignition System Check

• Remove the spark plugs and visually inspect for wear or carbon buildup.
• Replace any faulty spark plugs and check ignition coils for proper operation, replacing as needed.
• Reinstall spark plugs with the correct torque (usually around 15 ft-lbs).