how to check if my Ford Explorer’s fuel pump is working

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

638 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 check if your Ford Explorer's fuel pump is working. Step-by-step diagnostic and repair guide with essential tools and safety tips.

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.
•Wear safety glasses and gloves to protect against fuel spills.

Symptoms

•Engine does not start or has difficulty starting
•Engine stalls or loses power while driving
•Unusual noise coming from the fuel tank area
•Check engine light illuminated
•Poor fuel economy

Diagnostic Steps

1
Verify Fuel Level: Ensure there is an adequate amount of fuel in the tank.
2
Listen for Fuel Pump Operation: Turn the ignition key to the 'ON' position without starting the engine and listen for a humming sound from the fuel tank.
3
Check Fuel Pressure: Use a fuel pressure gauge to measure the fuel pressure at the fuel rail. Compare the reading to the manufacturer's specifications.
4
Inspect Fuel Pump Relay and Fuse: Check the fuel pump relay and fuse for continuity and operation.
5
Test Voltage at Fuel Pump Connector: Using a multimeter, check for voltage at the fuel pump connector while the ignition is in the 'ON' position.
6
Check for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to check for any error codes related to the fuel system.

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
•Multimeter
•Fuel pressure gauge
•Socket set
•Safety glasses
•Gloves

Parts Required

•Replacement fuel pump (if defective)
•Fuel filter (if needed)

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Diagnostic Steps

1
Verify Fuel Level: Ensure there is an adequate amount of fuel in the tank.
2
Listen for Fuel Pump Operation: Turn the ignition key to the 'ON' position without starting the engine and listen for a humming sound from the fuel tank.
3
Check Fuel Pressure: Use a fuel pressure gauge to measure the fuel pressure at the fuel rail. Compare the reading to the manufacturer's specifications.
4
Inspect Fuel Pump Relay and Fuse: Check the fuel pump relay and fuse for continuity and operation.
5
Test Voltage at Fuel Pump Connector: Using a multimeter, check for voltage at the fuel pump connector while the ignition is in the 'ON' position.
6
Check for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to check for any error codes related to the fuel system.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, fuel pressure gauge, socket set, safety glasses, gloves.
Safety Warnings: Disconnect the battery before working on electrical systems. Wear safety glasses and gloves to protect against fuel spills.

2. Access the Fuel Pump

Sub-steps:
1. Lift the Vehicle: Use a jack to elevate the rear of the vehicle and secure it on jack stands.
2. Remove Fuel Tank Shield (if applicable): Unbolt and remove any protective shields covering the fuel tank.
3. Disconnect Fuel Lines: Carefully disconnect the fuel lines from the fuel pump assembly, using a line wrench to prevent damage.
4. Disconnect Electrical Connector: Unplug the electrical connector from the fuel pump.

3. Remove the Fuel Pump

Sub-steps:
1. Unbolt Fuel Pump Assembly: Remove the retaining bolts securing the fuel pump assembly to the fuel tank.
2. Lift Out the Fuel Pump: Carefully pull the fuel pump assembly from the tank, taking care not to damage the O-ring or the tank.

4. Inspect and Test the Fuel Pump

Sub-steps:
1. Visual Inspection: Look for any signs of damage, corrosion, or leaks in the fuel pump and its components.
2. Test Fuel Pump Operation: Connect the fuel pump directly to a 12V power supply to check if it operates. A functional pump should produce a consistent flow of fuel.

5. Reinstallation

Sub-steps:
1. Install New Pump (if needed): If the fuel pump is faulty, replace it with a new one, ensuring a proper fit and sealing.
2. Reassemble in Reverse Order: Reinstall the fuel pump assembly, reconnect the electrical connector, and fuel lines. Secure everything with the retaining bolts.
3. Reattach Fuel Tank Shield (if applicable): Reinstall any protective covers that were removed.