my Ford F-150 keeps stalling at stoplights, what could be the cause?

Solution

1. Preparation

• Gather tools and parts required for repairs.
• Ensure the vehicle is parked on a flat surface with the engine off and cool.
• Disconnect the battery to prevent electrical shorts and ensure safety.

2. Clean the Throttle Body

• Remove the air intake duct to access the throttle body.
• Use throttle body cleaner and a soft cloth or brush to clean the throttle plate and surrounding areas.
• Reinstall the air intake duct securely.

3. Replace Fuel Filter (if applicable)

• Locate the fuel filter, usually found along the fuel line.
• Relieve fuel system pressure by removing the fuel pump relay and starting the engine until it stalls.
• Disconnect the fuel lines from the filter using the appropriate line removal tool.
• Install the new fuel filter in the correct orientation and reconnect the fuel lines.

4. Inspect and Replace Spark Plugs (if necessary)

• Remove the ignition coil(s) by unbolting and disconnecting electrical connectors.
• Use a spark plug socket to remove old spark plugs.
• Check the gap on new spark plugs and adjust if necessary to manufacturer specifications.
• Install new spark plugs and reattach the ignition coil(s).

5. Test the Repair

• Reconnect the battery and start the engine.
• Allow the engine to idle and monitor for any stalling.
• Conduct a test drive to ensure the vehicle operates normally without stalling.