why does my Ford F-150 12th Generation (2009-2014) engine hesitate during acceleration

Solution

1. Preparation

• Gather tools and materials. Ensure the vehicle is parked on a flat surface.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coils from the spark plugs.
  3. Using a socket set, remove the old spark plugs.
  4. Inspect the old spark plugs for wear; replace them if necessary (recommended gap: 0.054 inches).
  5. Install new spark plugs and torque to manufacturer specifications (typically 13-15 lb-ft).
  6. Reconnect the ignition coils.

3. Clean Throttle Body

• Sub-steps:
  1. Remove the intake duct connected to the throttle body.
  2. Use throttle body cleaner and a soft cloth to clean the throttle plate and surrounding area.
  3. Ensure the throttle plate moves freely.
  4. Reattach the intake duct securely.

4. Inspect and Replace Fuel Filter

• Sub-steps:
  1. Locate the fuel filter (usually along the fuel line).
  2. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
  3. Disconnect the fuel lines from the filter (use caution as residual fuel may still be present).
  4. Install the new fuel filter, ensuring correct flow direction.
  5. Reconnect the fuel pump fuse and check for leaks.

5. Test and Replace MAF Sensor (if necessary)

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the air intake system.
  3. Test the MAF sensor's voltage output with a multimeter while the engine is running.
  4. If readings are out of specification, replace the MAF sensor and reconnect.