why is my Ford Mustang S550 (2015-2023) stalling at stoplights

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Clean the Throttle Body

• Tools Required: Throttle body cleaner, soft cloth, socket set.
• Remove the air intake duct to access the throttle body.
• Spray throttle body cleaner onto the throttle plate and scrub gently with a soft cloth.
• Wipe away any excess cleaner and carbon deposits.
• Reinstall the air intake duct and reconnect the battery.

3. Replace Spark Plugs and Ignition Coils (if necessary)

• Tools Required: Socket set, torque wrench.
• Remove the engine cover if applicable.
• Disconnect the electrical connectors from the ignition coils.
• Unbolt and remove the ignition coils from their respective cylinders.
• Remove old spark plugs using a spark plug socket.
• Install new spark plugs, torque to manufacturer specifications (typically around 12-15 lb-ft).
• Reinstall the ignition coils and reconnect the electrical connectors.

4. Check and Replace Fuel Filter (if applicable)

• Tools Required: Fuel line disconnect tool, socket set.
• 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 fuel line disconnect tool.
• Remove the old fuel filter and install the new one, ensuring the flow direction matches the vehicle's specifications.
• Reconnect the fuel lines and reinstall the fuel pump relay.