my Skoda Octavia NFL (2020-Present) has a rough start in the morning, what could be wrong?

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, fuel pressure gauge, socket set, torque wrench.
• Disconnect the negative battery terminal to ensure safety while working on the electrical systems.

2. Battery Inspection

• Sub-steps:
  1. Use a multimeter to check the battery voltage; it should read above 12.4 volts.
  2. Clean any corrosion from battery terminals using a wire brush.
  3. If the battery is weak (below 12 volts), replace it with a new battery that meets OEM specifications.

3. Fuel System Check

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine to check the fuel pressure; it should meet manufacturer specifications (usually around 50-60 psi).
  3. If pressure is low, inspect the fuel pump and filter for blockage or failure, replacing them as necessary.

4. Spark Plug and Ignition Coil Inspection

• Sub-steps:
  1. Remove the spark plugs using a socket wrench; inspect for signs of wear or fouling.
  2. Replace any damaged spark plugs with OEM recommended plugs and torque to specification (usually around 15-20 Nm).
  3. Test the ignition coils with a multimeter; replace any that do not meet resistance specifications.

5. Air Intake System Inspection

• Sub-steps:
  1. Visually inspect the air filter for dirt or blockage; replace if necessary.
  2. Check the intake hoses for cracks or leaks; replace any damaged hoses.
  3. Clean the throttle body using a throttle body cleaner to ensure unobstructed airflow.

6. Throttle Body and Intake Manifold

• Sub-steps:
  1. Remove the throttle body from the intake manifold by loosening the bolts with a socket set.
  2. Inspect the throttle plate for carbon buildup and clean if necessary.
  3. Reinstall the throttle body and torque bolts to the manufacturer’s specifications.