my Ford Explorer makes a hissing noise when I accelerate what's causing it

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

467 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 engine to cool before inspecting the intake or exhaust systems.

Symptoms

•Hissing noise noticeable during acceleration
•Decreased engine performance or power
•Potential check engine light illumination
•Rough engine idle or stalling
•Increased fuel consumption

Diagnostic Steps

1
Inspect for vacuum leaks in the intake system using a smoke machine or carburetor cleaner.
2
Check the condition of the air intake hoses for cracks or loose connections.
3
Scan the vehicle’s ECU for any error codes using an OBD-II scanner.
4
Inspect the exhaust system for leaks, particularly at joints or near the catalytic converter.
5
Listen for abnormal sounds while revving the engine in neutral to isolate the noise source.

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
•Jack and jack stands
•Exhaust leak detector
•Wrench set

Parts Required

•Replacement air intake hoses
•Exhaust sealant or pipe section (if applicable)

Related Faults

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Diagnostic Steps

1
Inspect for vacuum leaks in the intake system using a smoke machine or carburetor cleaner.
2
Check the condition of the air intake hoses for cracks or loose connections.
3
Scan the vehicle’s ECU for any error codes using an OBD-II scanner.
4
Inspect the exhaust system for leaks, particularly at joints or near the catalytic converter.
5
Listen for abnormal sounds while revving the engine in neutral to isolate the noise source.

Solution

1. Preparation

Gather 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 Air Intake System

Tools Required: Socket set, pliers, vacuum gauge.
Sub-steps:
1. Remove the engine cover if applicable.
2. Inspect all air intake hoses for signs of wear, cracks, or loose connections.
3. Tighten any loose clamps and replace damaged hoses as necessary.
4. Reconnect any disconnected vacuum lines.

3. Examine the Exhaust System

Tools Required: Jack and jack stands, exhaust leak detector, wrench set.
Sub-steps:
1. Safely lift the vehicle and secure it with jack stands.
2. Visually inspect the exhaust pipes and joints for any holes or rust.
3. If a leak is found, use exhaust sealant or replace the damaged section of the exhaust pipe.
4. Reinstall any components removed during inspection.

4. Address Any Error Codes

Tools Required: OBD-II scanner.
Sub-steps:
1. Reconnect the battery and start the engine.
2. Use the OBD-II scanner to check for error codes related to the air intake or exhaust systems.
3. Clear any codes and monitor the system for reoccurrence.