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

488 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 battery before working on electrical systems.
•Allow engine to cool before inspecting any components.

Symptoms

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

Diagnostic Steps

1
Inspect the intake system for visible cracks or loose connections in hoses and clamps.
2
Use an OBD-II scanner to check for any stored trouble codes.
3
Conduct a vacuum leak test using a smoke machine or carburetor cleaner around suspected areas.
4
Examine the exhaust system for leaks, particularly at joints or near the manifold.
5
Check the condition of the air filter and ensure it is properly seated.
6
Listen for the hissing noise while manually manipulating suspected hoses or components.

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
•Torque wrench
•Screwdriver set
•Vacuum gauge or smoke machine

Parts Required

•Intake or vacuum hoses (if damaged)
•Exhaust gaskets (if leaks are found)
•Air filter (if dirty)

Related Faults

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Diagnostic Steps

1
Inspect the intake system for visible cracks or loose connections in hoses and clamps.
2
Use an OBD-II scanner to check for any stored trouble codes.
3
Conduct a vacuum leak test using a smoke machine or carburetor cleaner around suspected areas.
4
Examine the exhaust system for leaks, particularly at joints or near the manifold.
5
Check the condition of the air filter and ensure it is properly seated.
6
Listen for the hissing noise while manually manipulating suspected hoses or components.

Solution

1. Preparation

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

2. Inspect Intake Hoses and Components

Sub-step 1: Remove the engine cover if necessary to access the intake system.
Sub-step 2: Inspect all intake hoses for cracks or loose connections; tighten or replace as needed.
Sub-step 3: Check the throttle body and clean it if there is carbon buildup.

3. Check for Exhaust Leaks

Sub-step 1: Inspect the exhaust manifold and all joints for signs of leakage (rust, soot).
Sub-step 2: If a leak is found, replace gaskets or components as necessary.
Sub-step 3: Use a torque wrench to ensure all bolts are tightened to manufacturer specifications.

4. Conduct Vacuum Leak Repair

Sub-step 1: If a vacuum leak is confirmed, replace damaged hoses.
Sub-step 2: Use vacuum caps for any unused ports to seal leaks.

5. Reassemble and Test

Sub-step 1: Reconnect the battery.
Sub-step 2: Start the engine and allow it to reach operating temperature.
Sub-step 3: Take the vehicle for a test drive to ensure the hissing noise is resolved.