why does my Ford Explorer make a hissing noise when I accelerate

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

508 words

Problem Statement

Learn how to diagnose and fix a hissing noise during acceleration in Ford Explorer. 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 inspecting the intake and exhaust systems.

Symptoms

•Hissing noise audible during acceleration
•Possible decrease in engine performance
•Engine may run rough or unevenly
•Check engine light may illuminate
•Increased fuel consumption

Diagnostic Steps

1
Inspect the air intake system for any leaks or loose connections.
2
Check for vacuum leaks around hoses and intake manifold.
3
Use an OBD-II scanner to read any stored trouble codes.
4
Inspect the throttle body for dirt or obstructions.
5
Examine the exhaust system for leaks, particularly around gaskets and joints.
6
Test the integrity of the PCV (Positive Crankcase Ventilation) valve and its hoses.

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
•Vacuum gauge
•Throttle body cleaner
•Screwdrivers

Parts Required

•Replacement air filter
•Replacement vacuum hoses (if found damaged)
•Exhaust gaskets (if leaks are present)
•Replacement PCV valve (if necessary)

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Diagnostic Steps

1
Inspect the air intake system for any leaks or loose connections.
2
Check for vacuum leaks around hoses and intake manifold.
3
Use an OBD-II scanner to read any stored trouble codes.
4
Inspect the throttle body for dirt or obstructions.
5
Examine the exhaust system for leaks, particularly around gaskets and joints.
6
Test the integrity of the PCV (Positive Crankcase Ventilation) valve and its hoses.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on the vehicle.

2. Inspect and Repair Air Intake

Tools Required: Socket set, screwdrivers, vacuum gauge
Remove the air intake duct from the throttle body.
Inspect the duct for cracks or loose fittings; replace if necessary.
Check and replace any damaged air filters.

3. Check for Vacuum Leaks

Tools Required: Vacuum gauge, hose clamps
With the engine running, use a vacuum gauge to check for proper readings; a low reading may indicate leaks.
Inspect all vacuum hoses for wear or damage; replace any that are cracked or frayed.

4. Throttle Body Inspection

Tools Required: Throttle body cleaner, soft cloth
Remove the throttle body from the intake manifold.
Clean the throttle body with throttle body cleaner and a soft cloth to remove carbon buildup.

5. Exhaust System Examination

Tools Required: Socket set, exhaust gasket set
Inspect the exhaust system from the manifold to the tailpipe for any signs of leaks or damage.
Replace any damaged gaskets or components found during inspection.

6. PCV Valve Check

Tools Required: Replacement PCV valve (if necessary)
Locate the PCV valve and its associated hoses; inspect for blockages or damage.
Replace the PCV valve if it is clogged or malfunctioning.