why does my Ford Explorer Sixth Generation (2020-present) make a knocking noise when I accelerate?

Ford Explorer Sixth Generation (2020-present)

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

519 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration in Ford Explorer 2020-2023. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow engine components to cool before servicing.

Symptoms

•Knocking noise heard when accelerating
•Vibration felt through the steering wheel or floorboard
•Loss of power during acceleration
•Check engine light illuminated
•Unusual engine or transmission fluid leaks

Diagnostic Steps

1
Scan the vehicle's OBD-II system for any stored error codes.
2
Inspect the engine mounts for wear or damage.
3
Check the condition and level of the engine oil and transmission fluid.
4
Look for any loose or damaged components in the exhaust system.
5
Perform a visual inspection of the drive axles and CV joints.
6
Test the ignition system components, including spark plugs and ignition coils.

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
•Engine hoist or jack
•Torque wrench
•Multimeter
•Screwdrivers
•Pliers

Parts Required

•Engine mounts (if identified as faulty)
•Engine oil (if low or dirty)
•Transmission fluid (if low or dirty)
•CV joints or axle assemblies (if necessary)
•Spark plugs (if worn)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for any stored error codes.
2
Inspect the engine mounts for wear or damage.
3
Check the condition and level of the engine oil and transmission fluid.
4
Look for any loose or damaged components in the exhaust system.
5
Perform a visual inspection of the drive axles and CV joints.
6
Test the ignition system components, including spark plugs and ignition coils.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Allow the engine to cool if recently used.

2. Inspect and Replace Engine Mounts

Sub-steps:
1. Using a socket set, remove the bolts securing the engine mounts to the engine and subframe.
2. Lift the engine slightly using an engine hoist or jack for better access.
3. Remove the old engine mounts and install new ones, ensuring proper alignment.
4. Torque the mount bolts to manufacturer specifications (typically around 30-40 ft-lbs, but refer to service manual for exact specs).

3. Check and Replace Fluid Levels

Sub-steps:
1. Check engine oil level using the dipstick; add oil if low, and replace if dirty.
2. Check the transmission fluid level using the dipstick; add fluid if necessary, ensuring it meets Ford specifications.
3. If fluid is dark or burnt, perform a transmission fluid change.

4. Inspect and Repair Exhaust System

Sub-steps:
1. Visually inspect the exhaust system for loose hangers or damaged sections.
2. Tighten any loose bolts or replace damaged components as needed.
3. Ensure that all connections are sealed to prevent leaks that could cause noise.

5. Inspect Drive Axles and CV Joints

Sub-steps:
1. Lift the vehicle securely on jack stands and remove the front wheels.
2. Inspect the CV boots for tears or leaks; replace if necessary.
3. Check for play in the CV joints; replace the axle assembly if found defective.

6. Check Ignition System

Sub-steps:
1. Remove spark plug wires and inspect for corrosion or damage.
2. Replace spark plugs if they show signs of wear or damage (typically every 30,000 to 100,000 miles).
3. Test the ignition coil’s resistance using a multimeter and replace if it’s out of specification.

Tools Required:

OBD-II scanner
Socket set
Engine hoist or jack
Torque wrench
Multimeter
Screwdrivers
Pliers

Parts Required:

Engine mounts (if identified as faulty)
Engine oil (if low or dirty)
Transmission fluid (if low or dirty)
CV joints or axle assemblies (if necessary)
Spark plugs (if worn)

Estimated Repair Time: 3-5 hours

Safety Warnings:

Disconnect the battery before working on electrical systems.
Allow engine components to cool before servicing.