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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

464 words

Problem Statement

Learn how to diagnose and fix hissing noise on start in Ford Explorer 2011-2019. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before starting any repairs.

Symptoms

•Hissing noise audible during engine start
•Possible rough idle or stalling
•Decreased engine performance or power
•Check engine light may illuminate
•Increased fuel consumption

Diagnostic Steps

1
Inspect the intake air duct for cracks or loose connections.
2
Check vacuum lines for leaks or damage.
3
Use an OBD-II scanner to check for error codes that may indicate a related issue.
4
Examine the throttle body for carbon buildup or obstructions.
5
Listen for the hissing noise while spraying soapy water on suspected leak areas to identify the 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
•Screwdriver set
•Throttle body cleaner
•Torque wrench

Parts Required

•Intake air duct (if damaged)
•Vacuum lines (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect the intake air duct for cracks or loose connections.
2
Check vacuum lines for leaks or damage.
3
Use an OBD-II scanner to check for error codes that may indicate a related issue.
4
Examine the throttle body for carbon buildup or obstructions.
5
Listen for the hissing noise while spraying soapy water on suspected leak areas to identify the source.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the battery to ensure safety during repairs.

2. Inspect and Repair Intake Duct

Sub-steps:
1. Remove any clamps securing the intake air duct to the throttle body and air filter box.
2. Inspect the duct for visible cracks or wear. If damaged, replace with a new intake duct.
3. Reinstall the duct securely, ensuring all clamps are tightened.

3. Check and Replace Vacuum Lines

Sub-steps:
1. Locate the vacuum lines leading from the intake manifold.
2. Inspect each line for cracks, wear, or disconnections.
3. If any lines are damaged, replace them with new vacuum lines.
4. Ensure all connections are tight and secure.

4. Clean Throttle Body

Sub-steps:
1. Reconnect the battery if previously disconnected.
2. Remove the throttle body by unscrewing the bolts holding it in place.
3. Use throttle body cleaner and a soft cloth to clean the interior of the throttle body.
4. Reinstall the throttle body and torque the bolts to the manufacturer’s specifications (typically around 89 inch-pounds).