why does my Volkswagen Golf Seventh Generation (2013-2020) engine shake at idle

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, vacuum gauge, multimeter.
• Safety Warnings: Disconnect the battery before working on electrical systems. Allow the engine to cool before inspecting components.

2. Inspect and Replace Engine Mounts

• Sub-steps:
  1. Support the engine with a jack and a block of wood to prevent damage.
  2. Remove the bolts securing the engine mount to the engine and chassis using a socket set.
  3. Replace worn or damaged engine mounts with new ones, ensuring they are aligned correctly.
  4. Torque the bolts to manufacturer specifications (typically around 30-50 Nm).
  5. Lower the engine back into place and remove the jack.

3. Check and Replace Spark Plugs

• Sub-steps:
  1. Remove the ignition coils or spark plug wires to access the spark plugs.
  2. Using a socket and extension, remove the spark plugs from the engine.
  3. Inspect the spark plugs for wear or fouling; replace them if necessary.
  4. Gap the new spark plugs to manufacturer specifications (usually around 0.7-0.8 mm).
  5. Install the new spark plugs and torque them to manufacturer specifications (typically around 20 Nm).

4. Inspect for Vacuum Leaks

• Sub-steps:
  1. Using a vacuum gauge, connect it to a vacuum source on the intake manifold.
  2. Start the engine and observe the vacuum reading; it should be steady.
  3. Inspect all vacuum hoses for cracks or disconnections, replacing any damaged hoses.
  4. Tighten all clamps and connections to ensure a tight seal.

5. Test and Replace Fuel System Components

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail and start the engine.
  2. Check the fuel pressure reading against manufacturer specifications (typically around 50-60 psi).
  3. If pressure is low, inspect the fuel filter for clogs and replace if necessary.
  4. If the fuel pump is faulty, replace it according to manufacturer instructions, ensuring to relieve fuel pressure before beginning.