why does my Ford Explorer Fifth Generation (2011-2019) lose power when going uphill?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 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

Discover how to diagnose and fix power loss issues when driving uphill in a Ford Explorer (2011-2019). Step-by-step guide with diagnostic 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 the fuel system or engine components.

Symptoms

•Check engine light illuminated
•Engine stalling or hesitation
•Reduced acceleration when pressing the gas pedal
•Poor fuel economy
•Increased engine noise or knocking
•Transmission slipping or delayed shifting

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect and test the fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering adequate pressure.
3
Check the air filter for clogs or restrictions that could affect airflow to the engine.
4
Inspect the throttle body for carbon buildup or improper operation.
5
Examine the transmission fluid level and condition; check for burnt smell or dark color.
6
Test the battery and charging system to ensure the engine is receiving sufficient electrical power.

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
•Multimeter
•Basic hand tools

Parts Required

•Fuel pump (if low pressure is identified)
•Throttle body cleaner
•Transmission fluid (Mercon LV)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect and test the fuel pressure using a fuel pressure gauge to ensure the fuel pump is delivering adequate pressure.
3
Check the air filter for clogs or restrictions that could affect airflow to the engine.
4
Inspect the throttle body for carbon buildup or improper operation.
5
Examine the transmission fluid level and condition; check for burnt smell or dark color.
6
Test the battery and charging system to ensure the engine is receiving sufficient electrical power.

Solution

1. Preparation

Tools Required: OBD-II scanner, fuel pressure gauge, socket set, multimeter, basic hand tools.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to avoid electrical shorts.

2. Fuel System Repair

Check Fuel Pressure:
- Connect the fuel pressure gauge to the fuel rail.
- Start the engine and monitor the pressure; it should meet manufacturer specifications (usually around 50-60 psi).
- If pressure is low, proceed to replace the fuel pump.
Replace Fuel Pump:
- Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
- Disconnect the fuel lines and electrical connectors from the fuel pump.
- Remove the fuel pump assembly from the fuel tank.
- Install the new fuel pump and reassemble components.

3. Throttle Body Cleaning

Remove Throttle Body:
- Disconnect the air intake duct and electrical connectors from the throttle body.
- Unbolt the throttle body from the intake manifold.
- Use a throttle body cleaner to remove carbon deposits from the throttle plate and body.
- Reinstall the throttle body and reconnect all components.

4. Transmission Fluid Check & Replacement

Inspect Transmission Fluid:
- Remove the transmission dipstick and check fluid level and condition.
- If fluid is low or burnt, drain the transmission oil pan.
- Replace the transmission filter if applicable and refill with the correct type of transmission fluid (typically Mercon LV for Ford).