my Skoda Octavia NFL (2020-Present) has a rough start in cold weather what's wrong

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety during the repair process.
• Allow the engine to cool before starting work.

2. Battery Inspection and Replacement

• Tools Required: Multimeter, socket set
• Sub-steps:
  1. Use a multimeter to check the battery voltage (should be above 12.6 volts).
  2. If the voltage is low, charge or replace the battery as necessary.
  3. Clean the battery terminals and ensure a tight connection.

3. Fuel System Check

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Attach the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine to check for pressure.
  3. Ensure the fuel pressure is within the manufacturer's specifications (typically around 50-60 psi).
  4. If pressure is low, check the fuel pump and filter for faults; replace as necessary.

4. Spark Plug Inspection

• Tools Required: Spark plug socket, torque wrench
• Sub-steps:
  1. Remove each spark plug using the spark plug socket.
  2. Inspect plugs for wear, carbon buildup, or oil fouling.
  3. Replace any damaged plugs with OEM-spec plugs.
  4. Torque the new plugs to the manufacturer’s specifications (typically around 20-30 Nm).

5. Engine Coolant Temperature Sensor Inspection

• Tools Required: Multimeter
• Sub-steps:
  1. Locate the engine coolant temperature sensor.
  2. Disconnect the electrical connector and test the sensor's resistance with a multimeter.
  3. Replace the sensor if readings are out of specification.

6. Air Intake System Inspection

• Tools Required: Basic hand tools
• Sub-steps:
  1. Inspect the air filter for dirt and debris; replace if necessary.
  2. Check the intake hose for cracks or leaks.
  3. Clean the throttle body if there is carbon buildup.