why does my Toyota Corolla E170 (2013-2019) make a hissing noise when I accelerate

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

469 words

Problem Statement

Discover how to diagnose and fix the hissing noise during acceleration in your 2013-2019 Toyota Corolla E170. Step-by-step guide included.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool down before inspecting the intake and exhaust systems.

Symptoms

•Hissing noise during acceleration
•Decreased engine performance
•Possible check engine light illumination
•Increased fuel consumption
•Unusual vibrations from the engine

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related trouble codes.
2
Inspect the intake system for vacuum leaks, including hoses and gaskets.
3
Check the air filter for blockages or damage.
4
Examine the exhaust system for leaks, particularly around the manifold and joints.
5
Test the throttle body for proper operation and cleanliness.
6
Inspect the PCV (Positive Crankcase Ventilation) system for functionality.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Throttle body cleaner
•Smoke machine (optional)

Parts Required

•Vacuum hoses (if damaged)
•Gaskets (if leaking)
•PCV valve (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related trouble codes.
2
Inspect the intake system for vacuum leaks, including hoses and gaskets.
3
Check the air filter for blockages or damage.
4
Examine the exhaust system for leaks, particularly around the manifold and joints.
5
Test the throttle body for proper operation and cleanliness.
6
Inspect the PCV (Positive Crankcase Ventilation) system for functionality.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to avoid electrical shorts.

2. Inspect and Repair Intake System

Check for Vacuum Leaks
- Start the engine and visually inspect all vacuum hoses for cracks or disconnections.
- Use a smoke machine or carburetor cleaner to identify leaks by spraying around suspected areas.
- Replace any damaged hoses or gaskets as needed.
Clean the Throttle Body
- Remove the intake hose connected to the throttle body using a socket set.
- Spray throttle body cleaner onto a clean cloth and wipe the inside of the throttle body.
- Reinstall the intake hose and ensure it is securely fastened.

3. Examine Exhaust System

Inspect for Exhaust Leaks
- Start the engine and listen for hissing near the exhaust manifold and joints.
- Use a smoke test to locate leaks if necessary.
- Tighten any loose bolts or replace gaskets as required.

4. Check PCV System

Locate the PCV valve, remove it, and inspect for clogs.
Clean or replace the PCV valve if necessary.
Reinstall the valve and ensure all connections are secure.