why does my Ford Explorer Fifth Generation (2011-2019) lose power during acceleration?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

577 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 loss of power during acceleration in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostics, and solutions.

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 the engine to cool down before inspecting the exhaust system.

Symptoms

•Check engine light illuminated
•Engine stalling during acceleration
•Rough engine idle
•Unresponsive throttle
•Decreased fuel efficiency
•Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored faults.
2
Check fuel pressure using a fuel pressure gauge to ensure the fuel system is operating correctly.
3
Inspect the air intake system for blockages, leaks, or damaged components.
4
Examine the throttle body for carbon buildup or mechanical issues.
5
Test the ignition system components, including spark plugs and ignition coils, for proper operation.
6
Inspect the exhaust system for restrictions or blockages, such as a clogged catalytic converter.

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
•Fuel pressure gauge
•Socket set
•Screwdriver set
•Cleaning supplies
•Multimeter
•Throttle body cleaner

Parts Required

•Fuel filter (if applicable)
•Spark plugs
•Ignition coils (if applicable)
•Throttle body gasket (if needed)
•Catalytic converter (if found to be faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored faults.
2
Check fuel pressure using a fuel pressure gauge to ensure the fuel system is operating correctly.
3
Inspect the air intake system for blockages, leaks, or damaged components.
4
Examine the throttle body for carbon buildup or mechanical issues.
5
Test the ignition system components, including spark plugs and ignition coils, for proper operation.
6
Inspect the exhaust system for restrictions or blockages, such as a clogged catalytic converter.

Solution

1. Preparation

Tools Required: OBD-II scanner, fuel pressure gauge, socket set, screwdriver set, cleaning supplies.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to avoid electrical shocks.

2. Check Fuel System

Sub-steps:
1. Connect the fuel pressure gauge to the fuel rail test port.
2. Turn the ignition to the "ON" position (do not start the engine) and check for fuel pressure reading; it should be within the manufacturer’s specifications (typically 58-65 psi).
3. If the pressure is low, inspect the fuel pump, filter, and fuel lines for blockages or failures.
4. Replace any faulty components as needed.

3. Clean Throttle Body

Sub-steps:
1. Remove the intake duct leading to the throttle body using a socket set.
2. Disconnect the throttle body electrical connector and remove the throttle body bolts.
3. Carefully remove the throttle body and clean it using throttle body cleaner and a soft cloth to eliminate carbon buildup.
4. Reinstall the throttle body and reconnect the electrical connector.

4. Inspect Ignition System

Sub-steps:
1. Remove the engine cover if necessary to access the ignition coils.
2. Inspect the spark plugs for wear and carbon fouling; replace them if necessary.
3. Test the ignition coils with a multimeter to ensure they meet specifications.
4. Replace any faulty ignition components.

5. Assess Exhaust System

Sub-steps:
1. Inspect the exhaust system visually for any signs of damage or blockage.
2. If a catalytic converter issue is suspected, perform a back pressure test to confirm.
3. Replace a clogged catalytic converter if necessary.