how to check for a bad fuel pump in Ford F-150 12th Generation (2009-2014)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, fuel pressure gauge, socket set, screwdrivers, safety glasses, gloves.
• Ensure vehicle is parked on a level surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Inspect Fuel Pump Fuse and Relay

• Sub-steps:
  1. Locate the fuse box (usually under the dashboard or in the engine compartment).
  2. Remove the fuel pump fuse and inspect it for continuity using a multimeter.
  3. Replace any blown fuses and test the relay by swapping it with a similar one in the fuse box.

3. Test Fuel Pump Operation

• Sub-steps:
  1. Turn the ignition key to the "ON" position to activate the fuel pump.
  2. Listen for a humming sound from the fuel tank for about 2 seconds.
  3. If no sound is heard, proceed to check the wiring and connections.

4. Perform Fuel Pressure Test

• Sub-steps:
  1. Locate the fuel rail on the engine and find the Schrader valve.
  2. Attach the fuel pressure gauge to the Schrader valve.
  3. Turn the ignition to the "ON" position without starting the engine and note the pressure reading.
  4. Compare the reading with manufacturer specifications (usually 30-50 psi for F-150).
  5. If readings are below specifications, the fuel pump may need replacement.

5. Replace Fuel Pump (if necessary)

• Sub-steps:
  1. Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
  2. Disconnect the negative battery terminal.
  3. Raise the vehicle and support it securely with jack stands.
  4. Remove the fuel tank by disconnecting the straps and lowering it carefully.
  5. Disconnect the electrical connector and fuel lines from the fuel pump assembly.
  6. Remove the pump assembly from the tank and install the new fuel pump.
  7. Reassemble by reversing the removal steps, ensuring all connections are secure.