how to diagnose my Ford Explorer Fifth Generation (2011-2019) fuel economy problems

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

557 words

Problem Statement

Learn how to diagnose and fix fuel economy problems in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Poor fuel economy compared to previous performance
•Check engine light illuminated
•Engine stalling or rough idling
•Unusual exhaust odors or increased emissions
•Decreased acceleration or power loss
•Fuel system noises (e.g., whining or hissing)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential faults.
2
Check tire pressure and condition to ensure they are within specifications.
3
Inspect air filter for clogs or restrictions, replacing if necessary.
4
Test fuel pressure using a fuel pressure gauge to ensure proper delivery.
5
Examine the throttle body for carbon buildup and clean if needed.
6
Monitor fuel trim readings in live data to assess fuel mixture.

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
•Tire pressure gauge
•Fuel pressure gauge
•Throttle body cleaner
•Basic hand tools (screwdrivers, wrenches)

Parts Required

•Air filter
•Throttle body cleaner (if cleaning is needed)
•Fuel filter (if replacement is required)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential faults.
2
Check tire pressure and condition to ensure they are within specifications.
3
Inspect air filter for clogs or restrictions, replacing if necessary.
4
Test fuel pressure using a fuel pressure gauge to ensure proper delivery.
5
Examine the throttle body for carbon buildup and clean if needed.
6
Monitor fuel trim readings in live data to assess fuel mixture.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface.
Disconnect the battery for safety.

2. Address Fault Codes

Sub-step 1: If error codes are present, use the OBD-II scanner to note them.
Sub-step 2: Research codes to understand the underlying issues (e.g., O2 sensors, MAF sensor).
Sub-step 3: Clear codes and perform a test drive to see if they return.

3. Inspect and Replace Air Filter

Sub-step 1: Locate the air filter housing and remove the cover.
Sub-step 2: Take out the old air filter and inspect for dirt and debris.
Sub-step 3: Install a new air filter if necessary, ensuring a snug fit.

4. Clean Throttle Body

Sub-step 1: Remove the air intake duct to access the throttle body.
Sub-step 2: Use throttle body cleaner and a soft brush to clean the throttle plate and surrounding areas.
Sub-step 3: Reattach the air intake duct securely.

5. Check Fuel Pressure

Sub-step 1: Locate the fuel rail service port and attach a fuel pressure gauge.
Sub-step 2: Start the engine and observe the fuel pressure reading. Compare it to manufacturer's specifications (usually around 50-60 psi).
Sub-step 3: If pressure is low, further diagnose the fuel pump or filter.

6. Inspect Tires and Alignment

Sub-step 1: Check tire pressure using a tire gauge; inflate to recommended PSI if needed.
Sub-step 2: Inspect tires for wear and alignment issues. Rotate or align if necessary.