my Ford Mustang S550 (2015-2023) is stalling at stop signs what's wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is turned off. Disconnect the battery for safety.

2. Inspect and Clean Throttle Body

• Remove the air intake duct connected to the throttle body.
• Use throttle body cleaner and a soft cloth to clean the throttle body and remove any carbon deposits.
• Reconnect the air intake duct securely.

3. Replace Fuel Filter (if necessary)

• Locate the fuel filter; it may be in-line or part of the fuel pump module.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel lines and remove the old fuel filter.
• Install the new fuel filter, ensuring correct orientation and secure connections.

4. Clean or Replace Idle Air Control Valve

• Remove the IAC valve from its mounting location.
• Clean the valve using a suitable cleaner, or replace it if it shows signs of failure.
• Reinstall the IAC valve securely.

5. Check and Repair Vacuum Leaks

• Inspect all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses and ensure all connections are tight.
• Recheck for leaks using a smoke test if necessary.

Tools Required:

• OBD-II scanner
• Throttle body cleaner
• Soft cloth
• Socket set
• Multimeter
• Screwdrivers
• Vacuum gauge (optional)

Parts Required:

• Fuel filter (if applicable)
• Idle air control valve (if replacement is necessary)
• Vacuum hoses (if damaged)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow the engine to cool before performing any work on the throttle body or air intake system.