why does my Ford F-150 12th Generation (2009-2014) have a rough start in the morning

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Replace Spark Plugs

• Remove the ignition coil covers using a socket set.
• Disconnect the ignition coils from the spark plugs.
• Remove the old spark plugs using a spark plug socket.
• Inspect the spark plug gap and condition; replace with OEM spark plugs if necessary.
• Torque new spark plugs to manufacturer specifications (typically 13-15 ft-lbs).
• Reinstall the ignition coils and covers.

3. Test and Replace Fuel Filter

• Locate the fuel filter and relieve fuel system pressure by removing the fuel pump relay.
• Disconnect the fuel lines from the filter, using caution to avoid spills.
• Replace the fuel filter with a new OEM part.
• Reconnect the fuel lines securely and reinsert the fuel pump relay.
• Turn the ignition to the "ON" position to prime the fuel system before starting the engine.

4. Inspect Engine Coolant Temperature Sensor

• Locate the engine coolant temperature sensor and disconnect the electrical connector.
• Test the sensor's resistance with a multimeter according to specifications.
• If the sensor is out of range, replace it with a new one.
• Reconnect the electrical connector and ensure it is secured.