why is my Ford Explorer losing power while driving

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

587 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

Discover how to diagnose and fix power loss issues in Ford Explorer. Step-by-step instructions for troubleshooting and repairs.

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 any components

Symptoms

•Loss of acceleration when pressing the gas pedal
•Engine stalling or hesitation during acceleration
•Check engine light illuminated
•Poor fuel economy
•Unusual noises from the engine or exhaust system

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored diagnostic trouble codes (DTCs)
2
Inspect the air intake system for obstructions or leaks that could affect airflow
3
Check the fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering the correct pressure
4
Inspect the throttle body for carbon buildup or malfunctions
5
Examine the exhaust system for blockages, such as a clogged catalytic converter
6
Test the ignition system components, including spark plugs and ignition coils, for proper operation

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
•Throttle body cleaner
•Socket set
•Vacuum gauge
•Flathead screwdriver
•Pliers

Parts Required

•Replacement fuel filter (if necessary)
•New spark plugs (if worn)
•New ignition coils (if tested faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored diagnostic trouble codes (DTCs)
2
Inspect the air intake system for obstructions or leaks that could affect airflow
3
Check the fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering the correct pressure
4
Inspect the throttle body for carbon buildup or malfunctions
5
Examine the exhaust system for blockages, such as a clogged catalytic converter
6
Test the ignition system components, including spark plugs and ignition coils, for proper operation

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Addressing Error Codes

Sub-step 1: Use the OBD-II scanner to retrieve error codes and document them.
Sub-step 2: Research the codes to determine the affected components and potential repairs needed.

3. Inspecting the Air Intake System

Sub-step 1: Remove the air intake duct and inspect for debris or obstructions.
Sub-step 2: Check for any vacuum leaks in hoses connected to the intake manifold.
Tools Required: Flathead screwdriver, pliers.

4. Checking Fuel Pressure

Sub-step 1: Locate the fuel pressure test port on the fuel rail.
Sub-step 2: Connect the fuel pressure gauge and turn the ignition to the "ON" position (do not start the engine) to check the pressure reading.
Sub-step 3: Compare the reading with the manufacturer specifications; if low, inspect the fuel pump and filter.
Tools Required: Fuel pressure gauge.

5. Cleaning the Throttle Body

Sub-step 1: Disconnect the negative battery terminal to prevent electrical shorts.
Sub-step 2: Remove the throttle body from the intake manifold.
Sub-step 3: Use throttle body cleaner and a soft brush to clean carbon buildup.
Sub-step 4: Reinstall the throttle body and reconnect the battery.
Safety Warnings: Ensure the engine is cool before working on the throttle body.

6. Checking the Exhaust System

Sub-step 1: Inspect the exhaust system visually for any visible damage or blockages.
Sub-step 2: If a clogged catalytic converter is suspected, use a vacuum gauge to test back pressure.
Sub-step 3: Replace the catalytic converter if back pressure exceeds manufacturer specifications.
Tools Required: Vacuum gauge, socket set.