why does my Ford F-150 12th Generation (2009-2014) engine misfire when accelerating

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to ensure safety.

2. Inspect and Replace Spark Plugs

• Remove the ignition coil cover if applicable.
• Use a socket set to remove spark plugs.
• Inspect the spark plugs for wear or carbon buildup; replace if necessary.
• Install new spark plugs using the manufacturer’s recommended torque specification (typically around 13 lb-ft).
• Reinstall the ignition coils.

3. Test and Replace Ignition Coils

• Remove the ignition coils from the affected cylinders.
• Use a multimeter to check for proper resistance according to specifications (typically 0.5 to 1.5 ohms).
• Replace any faulty ignition coils with new ones.
• Reinstall the ignition coils securely.

4. Inspect and Clean Fuel Injectors

• Remove the intake manifold if necessary to access the fuel injectors.
• Use a fuel injector cleaning kit or professional service to clean the injectors.
• Reinstall fuel injectors and ensure they click into place.

5. Check and Repair Vacuum Leaks

• Inspect all vacuum lines and hoses for cracks or disconnections.
• Replace any damaged vacuum lines.
• Test for leaks using a smoke test if necessary.