my Ford Explorer is making a knocking noise when I accelerate, what's the cause?

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

540 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 the battery before working on electrical systems.
•Allow the engine to cool before opening the oil drain plug or filter.

Symptoms

•Knocking or pinging sound from the engine when accelerating
•Loss of power during acceleration
•Engine misfire or rough running
•Poor fuel economy
•Possible check engine light illumination

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the engine oil level and condition, ensuring it is within the recommended range and not contaminated.
3
Visually inspect the engine and transmission mounts for signs of wear or damage.
4
Check the fuel system for proper pressure and flow using a fuel pressure gauge.
5
Listen for the knocking noise while performing a stationary rev of the engine 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
•Torque wrench
•Oil filter wrench
•Fuel pressure gauge
•Jack and jack stands

Parts Required

•Engine oil
•Oil filter
•Engine and transmission mounts
•Fuel filter (if necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2
Inspect the engine oil level and condition, ensuring it is within the recommended range and not contaminated.
3
Visually inspect the engine and transmission mounts for signs of wear or damage.
4
Check the fuel system for proper pressure and flow using a fuel pressure gauge.
5
Listen for the knocking noise while performing a stationary rev of the engine to isolate the source.

Solution

1. Preparation

Gather tools and materials needed for the repair.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to avoid any electrical issues.

2. Inspect and Replace Engine Oil

Check Oil Level:
- Remove the dipstick, wipe it clean, and reinsert it to check the oil level.
- If low, add the manufacturer-recommended oil type.
Change Oil:
- Drain the old oil using a wrench to remove the oil drain plug.
- Replace with new oil, ensuring to use the correct viscosity as specified in the owner’s manual.
Check Oil Filter:
- Remove the old oil filter using an oil filter wrench.
- Install a new filter, lubricating the rubber gasket with new oil before installation.

3. Inspect and Replace Engine and Transmission Mounts

Remove Old Mounts:
- Lift the vehicle using a jack and secure with jack stands.
- Remove any components obstructing access to the mounts.
- Use a socket set to unbolt the engine and transmission mounts.
Install New Mounts:
- Position the new mounts in place and tighten bolts to the manufacturer’s torque specifications.

4. Check Fuel System

Fuel Pressure Test:
- Connect a fuel pressure gauge to the fuel rail.
- Turn the ignition to the “ON” position without starting the engine to check for proper pressure.
- If pressure is low, inspect the fuel pump and filter for issues.