how to fix a rough idle on my Ford Mustang S550 (2015-2023) after an oil change

Solution

1. Preparation

• Gather necessary tools and parts.
• Safety precaution: Disconnect the negative battery terminal to avoid electrical shorts.

2. Check Oil Quality

• Remove the dipstick and inspect the oil for contamination or metal shavings.
• If oil appears dirty or has metal particles, drain the oil and replace it with fresh oil.
  • Tools: Socket set for oil drain plug, oil filter wrench.

3. Inspect Air Intake

• Check the air intake hose for proper connection and any cracks.
• Ensure the mass airflow sensor (MAF) is clean; use MAF cleaner if necessary.
  • Tools: Screwdriver set, MAF cleaner.

4. Examine Spark Plugs and Coils

• Remove the ignition coils by unscrewing them and gently pulling them out.
• Inspect the spark plugs for wear; replace if the electrodes are worn down.
  • Tools: Spark plug socket, torque wrench (specify torque according to manufacturer's specifications).

5. Clean Fuel Injectors

• Use a fuel injector cleaner or a professional cleaning kit to ensure injectors are not clogged.
• Reinstall injectors securely.
  • Tools: Fuel injector cleaning kit.

6. Reassemble and Reconnect

• Reattach the air intake system and ensure all clamps are tightened.
• Reconnect the negative battery terminal.