my Ford Mustang S550 (2015-2023) has a rough start in the morning what's wrong

Solution

1. Preparation

• Gather all necessary tools and parts before starting.
• Disconnect the negative battery terminal to prevent any electrical shorts.
• Allow the engine to cool completely before beginning work.

2. Inspect and Replace Spark Plugs

• Remove the engine cover if applicable.
• Use a socket set to remove the spark plug wires or ignition coils.
• Remove the spark plugs using a spark plug socket.
• Inspect each spark plug for signs of wear or fouling; replace if necessary with OEM-spec plugs.
• Torque new spark plugs to the manufacturer’s specification (typically around 13-15 lb-ft).

3. Check and Replace Air Filter

• Locate the air intake box and open it.
• Remove the old air filter and inspect for dirt and blockages.
• Clean the intake box with a damp cloth if necessary.
• Install a new air filter, ensuring it fits snugly to prevent air leaks.

4. Fuel System Inspection

• Connect a fuel pressure gauge to the fuel rail.
• Start the engine and observe the fuel pressure; it should meet the manufacturer’s specifications (typically around 50-60 psi for most Mustangs).
• If the pressure is low, inspect the fuel pump and fuel filter for potential blockages or failures.
• Replace the fuel filter if it hasn’t been changed in the last 30,000 miles.

5. Final Checks

• Reconnect the battery terminal.
• Start the engine to ensure it runs smoothly after repairs.
• Allow the vehicle to reach operating temperature and check for any warning lights.