my Volkswagen Golf MK7 (2015-2019) has poor fuel economy what's wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent any electrical issues while working.

2. Inspect and Replace Air Filter

• Remove the air filter cover using a socket set.
• Take out the old air filter and inspect it for dirt and blockages.
• Install a new air filter, ensuring it is seated properly.
• Reattach the air filter cover and secure it with the bolts.

3. Replace Spark Plugs

• Remove the ignition coil by unscrewing the bolts (if applicable).
• Carefully pull out the spark plug using a spark plug socket.
• Inspect the old spark plug for wear and carbon buildup.
• Install new spark plugs by hand to avoid cross-threading, then tighten to the manufacturer’s specified torque (usually around 15-20 lb-ft).
• Reinstall the ignition coil securely.

4. Fix Vacuum Leaks

• Visually inspect all vacuum hoses for cracks or loose connections.
• Replace any damaged hoses with new ones.
• If necessary, use a smoke test to identify hard-to-find leaks.

5. Check and Adjust Tire Pressure

• Use a tire pressure gauge to check each tire’s pressure.
• Inflate tires to the recommended pressure specified on the tire placard.
• Inspect the tires for uneven wear or damage, and replace if necessary.