my Ford Explorer makes a knocking noise when accelerating, what could it be?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

457 words

Problem Statement

Learn how to diagnose and fix knocking 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 opening any components.

Symptoms

•Knocking noise audible during acceleration
•Possible vibration felt through the vehicle
•Decreased power during acceleration
•Fluctuation in engine RPMs
•Check engine light potentially illuminated

Diagnostic Steps

1
Inspect the engine and transmission mounts for wear or damage.
2
Check for loose or damaged exhaust components.
3
Use an OBD-II scanner to check for any stored trouble codes.
4
Inspect the drivetrain components, including the driveshaft and CV joints.
5
Listen for the noise while the vehicle is stationary to isolate 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
•Wrench set
•Pry bar
•Jack
•Jack stands
•Flashlight

Parts Required

•Engine mounts (if damaged)
•Transmission mounts (if damaged)
•Exhaust hangers or bolts (if necessary)
•CV joints (if damaged)

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Diagnostic Steps

1
Inspect the engine and transmission mounts for wear or damage.
2
Check for loose or damaged exhaust components.
3
Use an OBD-II scanner to check for any stored trouble codes.
4
Inspect the drivetrain components, including the driveshaft and CV joints.
5
Listen for the noise while the vehicle is stationary to isolate the source.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is off.
Gather necessary tools and parts.
Disconnect the battery for safety.

2. Inspect Engine and Transmission Mounts

Tools Required: Socket set, pry bar
Remove any components obstructing access to the mounts.
Visually inspect the mounts for cracks or excessive wear.
Use a pry bar to check for excessive movement in the mounts.
Replace any damaged mounts with new ones.

3. Check Exhaust Components

Tools Required: Wrench set, flashlight
Inspect the exhaust system for loose bolts or broken hangers.
Tighten or replace any loose or damaged components.
Ensure there are no leaks or contact points with other parts of the vehicle.

4. Inspect Drivetrain Components

Tools Required: Jack, jack stands, socket set
Lift the vehicle and securely support it with jack stands.
Inspect the driveshaft for any signs of damage or excessive play.
Check the CV joints for wear; replace any that are torn or damaged.

5. Reassemble and Test

Reinstall any components removed during inspection.
Reconnect the battery and start the engine.
Test drive the vehicle to verify that the knocking noise is resolved.