why is my Ford Explorer making 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

442 words

Problem Statement

Learn how to diagnose and fix the 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 components.
•Allow the engine to cool before inspecting the exhaust system.

Symptoms

•Hissing noise noticeable during acceleration
•Possible loss of power or sluggish acceleration
•Check engine light may be illuminated
•Increased fuel consumption
•Unusual engine performance (rough idle or stalling)

Diagnostic Steps

1
Inspect the intake system for any visible cracks or loose connections.
2
Use an OBD-II scanner to check for any stored error codes.
3
Listen for hissing sounds around the engine bay while the engine is running.
4
Check all vacuum hoses for cracks or disconnections.
5
Examine the exhaust system for leaks, especially near the manifold and catalytic converter.

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

•Vacuum gauge
•Pliers
•Throttle body cleaner
•Screwdriver set
•Torque wrench
•Wrench set
•OBD-II scanner

Parts Required

•Replacement vacuum hoses
•Intake air duct (if damaged)
•Exhaust gaskets (if applicable)

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Diagnostic Steps

1
Inspect the intake system for any visible cracks or loose connections.
2
Use an OBD-II scanner to check for any stored error codes.
3
Listen for hissing sounds around the engine bay while the engine is running.
4
Check all vacuum hoses for cracks or disconnections.
5
Examine the exhaust system for leaks, especially near the manifold and catalytic converter.

Solution

1. Preparation

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

2. Inspect and Replace Vacuum Hoses

Sub-steps:
1. Visually inspect all vacuum hoses for wear and tear.
2. Use a vacuum gauge to test the integrity of the hoses.
3. Replace any damaged hoses with new ones, ensuring a snug fit.

Tools Required:

Vacuum gauge
Pliers
Replacement vacuum hoses

3. Repair or Replace Intake Components

Sub-steps:
1. Remove the air intake duct and inspect the throttle body and mass air flow (MAF) sensor for dirt or cracks.
2. Clean the throttle body with throttle body cleaner if dirty.
3. Replace the intake air duct if damaged or cracked.

Tools Required:

Throttle body cleaner
Screwdriver set
Torque wrench (for reassembly)

4. Check and Repair Exhaust System

Sub-steps:
1. Inspect the exhaust manifold and catalytic converter for any signs of leaks.
2. Tighten any loose bolts or flanges.
3. Replace any damaged gaskets or components as needed.

Tools Required:

Wrench set
Exhaust gasket set