why does my Volkswagen Golf MK7.5 (2020-Present) feel like it’s misfiring?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover (if equipped) to access the spark plugs.
• Use a socket wrench to remove the old spark plugs, taking note of their condition.
• Check the spark plug gap and replace with new spark plugs if necessary.
• Torque the new spark plugs to the manufacturer's specifications (typically around 20 Nm).

3. Inspect and Replace Ignition Coils

• Tools Required: Socket set
• Disconnect the wiring harness from each ignition coil.
• Remove the bolts securing the ignition coils and carefully pull them out of the spark plug wells.
• Inspect for cracks or damage, and replace any faulty coils with new ones.
• Reinstall the ignition coils, securing them with bolts, and reconnect the wiring harness.

4. Check and Replace Fuel Injectors (if necessary)

• Tools Required: Fuel pressure gauge, injector puller
• Connect the fuel pressure gauge to the fuel rail to check for proper fuel pressure.
• If pressure is low, inspect the fuel filter and pump.
• Remove the fuel rail and carefully extract the injectors using an injector puller.
• Replace any faulty injectors with new ones, ensuring proper O-ring placement.

5. Test and Reassemble

• Reconnect the negative battery terminal.
• Clear any error codes using an OBD-II scanner.
• Start the engine and allow it to reach operating temperature, monitoring for smooth operation.