why does my Skoda Octavia’s engine run rough at idle?

Solution

1. Preparation

• Gather tools and parts before starting the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench
• Remove the engine cover if necessary.
• Use a socket to remove the spark plug wires or ignition coils.
• Remove the old spark plugs using a spark plug socket.
• Check the gap on new spark plugs and install them with a torque value of 20 Nm.
• Reattach the ignition coils or spark plug wires.

3. Clean or Replace the Throttle Body

• Tools Required: Throttle body cleaner, screwdriver, cleaning cloth
• Disconnect the throttle body connector and remove any air intake ducting.
• Unbolt the throttle body from the intake manifold.
• Clean the throttle plate and body using throttle body cleaner and a cloth.
• If damaged, replace the throttle body with a new one and reassemble.

4. Check Fuel System

• Tools Required: Fuel pressure gauge
• Locate the fuel pressure test port on the fuel rail.
• Attach the fuel pressure gauge and turn the ignition to the "ON" position without starting the engine.
• Compare the reading with the manufacturer's specification; replace the fuel pump or filter if pressure is low.

5. Inspect Vacuum Hoses

• Tools Required: Visual inspection
• Trace all vacuum hoses from the intake manifold to various components.
• Look for signs of wear, cracks, or disconnections.
• Replace any damaged hoses to restore proper vacuum levels.