why is my Ford Explorer using so much fuel lately?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

594 words

Problem Statement

Learn how to diagnose and fix fuel consumption issues in Ford Explorer. 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 the battery before working on electrical systems
•Allow the engine to cool before inspecting the exhaust system

Symptoms

•Check engine light illuminated
•Poor fuel economy
•Engine stalling or rough idling
•Increased emissions or exhaust smoke
•Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the air filter for clogs or blockages that could restrict airflow
3
Check the fuel pressure using a fuel pressure gauge to ensure proper fuel delivery
4
Examine the exhaust system for leaks or blockages that might affect back pressure
5
Inspect the spark plugs for wear or fouling that could lead to inefficient combustion
6
Monitor the fuel trim readings to assess how the engine is adjusting fuel delivery

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
•Screwdriver
•Fuel pressure gauge
•Jack
•Jack stands

Parts Required

•New air filter
•New spark plugs
•Fuel filter (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the air filter for clogs or blockages that could restrict airflow
3
Check the fuel pressure using a fuel pressure gauge to ensure proper fuel delivery
4
Examine the exhaust system for leaks or blockages that might affect back pressure
5
Inspect the spark plugs for wear or fouling that could lead to inefficient combustion
6
Monitor the fuel trim readings to assess how the engine is adjusting fuel delivery

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to ensure safety while working on electrical components.

2. Replace Air Filter

Step 1: Locate the air filter housing.
Step 2: Remove the screws or clips securing the housing.
Step 3: Take out the old air filter and check for dirt or damage.
Step 4: Insert the new air filter, ensuring it fits snugly.
Tools Required: Screwdriver, new air filter.

3. Check and Replace Spark Plugs

Step 1: Remove the ignition coil or spark plug wires.
Step 2: Use a socket wrench to remove spark plugs.
Step 3: Inspect old spark plugs for wear; replace with new ones if necessary.
Step 4: Reinstall the spark plugs and reconnect the ignition components.
Tools Required: Socket set, torque wrench, new spark plugs.
Torque Specifications: Tighten spark plugs to manufacturer specifications (typically around 13-18 lb-ft).

4. Fuel Pressure Test

Step 1: Locate the fuel pressure test port on the fuel rail.
Step 2: Connect the fuel pressure gauge and turn the ignition to the "on" position without starting the engine.
Step 3: Record the pressure reading and compare it with manufacturer specifications.
Step 4: If pressure is low, check the fuel pump and filter for issues.
Tools Required: Fuel pressure gauge.

5. Inspect Exhaust System

Step 1: Raise the vehicle using jack stands for safety.
Step 2: Visually inspect the exhaust pipes, catalytic converter, and muffler for leaks or damage.
Step 3: Use a smoke machine if necessary to detect hidden leaks.
Tools Required: Jack, jack stands.