why does my Volkswagen Golf MK7 (2015-2019) engine vibrate at idle?

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace Engine Mounts

• Sub-steps:
  1. Lift the vehicle using a jack and secure it with jack stands.
  2. Remove the engine cover if necessary for better access.
  3. Inspect the engine mounts for excessive wear or damage.
  4. If mounts are worn, remove the bolts securing the mounts using a socket set.
  5. Replace with new mounts and torque to manufacturer specifications (typically around 30-40 Nm).

3. Replace Spark Plugs

• Sub-steps:
  1. Remove the ignition coil cover if applicable.
  2. Disconnect the ignition coils and remove them using a socket.
  3. Remove the old spark plugs using a spark plug socket.
  4. Install new spark plugs and torque to 20 Nm.
  5. Reconnect ignition coils.

4. Clean or Replace Idle Air Control Valve

• Sub-steps:
  1. Locate the IAC valve (usually near the throttle body).
  2. Disconnect the electrical connector and remove the mounting screws.
  3. Clean the valve with throttle body cleaner if it is dirty, or replace it if malfunctioning.
  4. Reinstall and reconnect the electrical connector.

5. Test Fuel Pressure

• Sub-steps:
  1. Locate the fuel rail and connect a fuel pressure gauge.
  2. Turn the ignition on (do not start the engine) and record the pressure.
  3. If the pressure is inadequate, inspect the fuel pump and filter for issues.