how to fix P0301 misfire code on Ford Mustang S650 (2024-Present)?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

1. Locate the spark plug for cylinder 1 (typically at the front of the engine).
2. Remove the ignition coil by unscrewing the retaining bolts and gently pulling it off.
3. Use a spark plug socket and ratchet to remove the old spark plug.
4. Inspect the new spark plug for proper gap (typically 0.030-0.035 inches) and install it.
5. Torque the new spark plug to the manufacturer’s specifications (usually around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil (if necessary)

1. If the ignition coil was found defective during diagnostics, replace it with a new one.
2. Secure the new ignition coil in place and reconnect the electrical connector.

4. Test Fuel Injector

1. Remove the fuel injector harness connector for cylinder 1.
2. Use a multimeter to check for resistance; compare it to the manufacturer's specifications.
3. If defective, replace the fuel injector by removing the fuel rail (ensure fuel pressure is relieved first).
4. Reinstall the fuel rail and reconnect the injector harness.

5. Perform Compression Test

1. Remove the spark plug from cylinder 1 and install a compression gauge.
2. Crank the engine and record the compression reading; it should match the manufacturer's specifications (usually between 150-200 psi).
3. If compression is low, further diagnostic may be required for internal engine issues.