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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before beginning work.

2. Replace Spark Plugs

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coils from the spark plugs.
• Use a spark plug socket to remove old spark plugs.
• Inspect the plug gap and condition; replace with OEM plugs if necessary.
• Torque new spark plugs to the manufacturer’s specification (typically 13-15 ft-lbs).
• Reconnect the ignition coils.

3. Inspect and Replace Ignition Coils

• Remove the ignition coils from the engine by unscrewing them (if applicable).
• Test each coil using a multimeter for resistance; replace any faulty coils.
• Install new ignition coils, ensuring they are seated properly.

4. Clean or Replace Fuel Injectors

• If injectors are clogged, use a fuel injector cleaner or remove them for a thorough cleaning.
• If damaged, replace with new ones following manufacturer specifications.
• Reinstall injectors and reconnect fuel lines.

5. Check and Replace MAF Sensor (if necessary)

• Disconnect the MAF sensor connector.
• Remove the sensor from the air intake duct.
• Clean the sensor with MAF cleaner; replace if cleaning does not resolve issues.
• Reinstall the MAF sensor and reconnect the electrical connector.