why is my Ford Explorer making a hissing sound when I accelerate

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

564 words

Problem Statement

Learn how to diagnose and fix the hissing sound during acceleration in Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Hissing noise during acceleration
•Decreased engine performance or power
•Check engine light illuminated
•Rough idle or stalling when stopped
•Poor fuel economy

Diagnostic Steps

1
Inspect the air intake system for any visible cracks or loose connections.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs).
3
Listen for the hissing sound with the hood open to pinpoint the location of the noise.
4
Check vacuum hoses and connections for leaks or damage.
5
Inspect the exhaust system for signs of leaks or damaged components.
6
Test the throttle body for proper operation and cleanliness.

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
•Pliers
•Vacuum gauge
•Throttle body cleaner
•Jack and jack stands

Parts Required

•Air filter (if needed)
•Vacuum hoses (if damaged)
•Exhaust components (if damaged)

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Diagnostic Steps

1
Inspect the air intake system for any visible cracks or loose connections.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs).
3
Listen for the hissing sound with the hood open to pinpoint the location of the noise.
4
Check vacuum hoses and connections for leaks or damage.
5
Inspect the exhaust system for signs of leaks or damaged components.
6
Test the throttle body for proper operation and cleanliness.

Solution

1. Preparation

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

2. Inspect and Repair Intake System

Tools Required: Socket set, screwdrivers, vacuum gauge
Steps:
1. Remove the air intake duct by loosening the clamps and detaching it from the throttle body.
2. Inspect the intake duct for cracks or loose fittings; replace if damaged.
3. Check the air filter and replace it if clogged.
4. Reassemble the intake duct, ensuring all connections are tight.

3. Check and Replace Vacuum Hoses

Tools Required: Pliers, cutting tool for hoses
Steps:
1. Visually inspect all vacuum hoses for cracks, frays, or disconnections.
2. Use a vacuum gauge to test if there are any leaks in the system.
3. Replace any damaged or leaking hoses with new ones.

4. Inspect Exhaust System

Tools Required: Jack and jack stands, socket set
Steps:
1. Raise the vehicle on jack stands to access the exhaust system.
2. Inspect the exhaust pipes, muffler, and catalytic converter for any leaks or damage.
3. Repair or replace any damaged exhaust components.

5. Clean Throttle Body (if necessary)

Tools Required: Throttle body cleaner, cleaning rag
Steps:
1. Remove the throttle body by unscrewing it from the intake manifold.
2. Clean the throttle body with a suitable cleaner and a rag to remove carbon buildup.
3. Reinstall the throttle body and reconnect any electrical connectors.