why does my Toyota Corolla E140 (2006-2013) make a hissing sound when accelerating?

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Repair the Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Sub-steps:
  1. Remove the engine cover (if applicable) using the appropriate socket.
  2. Visually inspect the air intake duct for cracks or loose connections.
  3. Check the condition of the air filter; replace if dirty.
  4. If vacuum leaks are suspected, connect a vacuum gauge to the intake manifold.
  5. Replace any damaged hoses or connections that are causing leaks.

3. Inspect the Exhaust System

• Tools Required: Jack and jack stands, socket set.
• Sub-steps:
  1. Safely lift the vehicle using a jack and secure it with jack stands.
  2. Visually inspect the exhaust manifold and piping for cracks or holes.
  3. Listen for hissing or leaking sounds while the engine is running.
  4. Tighten any loose clamps or bolts in the exhaust system.
  5. Replace any damaged gaskets or components as necessary.

4. Reassemble and Test

• Tools Required: Torque wrench.
• Sub-steps:
  1. Reinstall any components removed during the inspection.
  2. Ensure all connections are tight and secure.
  3. Reconnect the battery.
  4. Start the engine and allow it to idle while checking for leaks.