why does my Ford Explorer Fifth Generation (2011-2019) make a hissing noise when accelerating

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

546 words

Problem Statement

Learn how to diagnose and fix hissing noise during acceleration in Ford Explorer Fifth Generation. Step-by-step guide with diagnostic procedures 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 electrical systems.
•Allow the engine to cool before opening any components.

Symptoms

•Hissing noise during acceleration
•Possible loss of power or sluggish acceleration
•Check engine light illuminated (if applicable)
•Increased engine noise at higher RPMs
•Vacuum leak sound when the engine is idling

Diagnostic Steps

1
Inspect the air intake system for any visible cracks or loose connections.
2
Use a smoke machine to detect vacuum leaks in the intake manifold and hoses.
3
Scan the vehicle’s OBD-II system for any error codes related to the engine or air intake.
4
Check the condition of the throttle body and clean if necessary.
5
Inspect the vacuum lines for wear, damage, or disconnections.
6
Listen for abnormal sounds around the engine bay while an assistant accelerates the vehicle.

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

•Socket set
•Screwdrivers
•Flashlight
•Pliers
•Throttle body cleaner
•Smoke machine (optional)

Parts Required

•Replacement air filter
•Replacement vacuum hoses (if necessary)

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Diagnostic Steps

1
Inspect the air intake system for any visible cracks or loose connections.
2
Use a smoke machine to detect vacuum leaks in the intake manifold and hoses.
3
Scan the vehicle’s OBD-II system for any error codes related to the engine or air intake.
4
Check the condition of the throttle body and clean if necessary.
5
Inspect the vacuum lines for wear, damage, or disconnections.
6
Listen for abnormal sounds around the engine bay while an assistant accelerates the vehicle.

Solution

1. Preparation

Gather tools and materials.
Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Inspect and Repair Air Intake System

Tools Required: Socket set, screwdrivers, flashlight
Sub-steps:
1. Open the hood and locate the air intake system.
2. Check the air filter housing for any cracks or loose clamps.
3. Remove the air filter and inspect the filter for dirt and damage; replace if necessary.
4. Tighten or replace any loose or damaged clamps and hoses.

3. Check and Replace Vacuum Lines

Tools Required: Pliers, replacement vacuum hoses
Sub-steps:
1. Visually inspect all vacuum lines connected to the intake manifold for cracks or leaks.
2. If damaged, cut the old vacuum line at the leaking section and replace it with a new hose; ensure a snug fit.
3. Recheck all connections to ensure they are secure.

4. Clean Throttle Body

Tools Required: Throttle body cleaner, soft cloth, socket set
Sub-steps:
1. Disconnect the negative battery terminal.
2. Remove the air intake duct to access the throttle body.
3. Use the throttle body cleaner and a soft cloth to clean the inside of the throttle body thoroughly.
4. Reassemble the air intake duct and reconnect the battery terminal.

5. Test for Leaks

Tools Required: Smoke machine (if available)
Sub-steps:
1. Connect the smoke machine to the intake system to introduce smoke into the system.
2. Observe for smoke escaping from any areas, indicating a leak.
3. Repair any identified leaks accordingly.