Based on the information you provided, it seems that there may be a problem with the engine's performance and idle stability. Since you've already replaced the spark plugs and performed an oil and filter change without any improvement, there could be other potential causes for the issue.
Here are a few suggestions for your next steps:
Here are a few suggestions for your next steps:
- Check for vacuum leaks: A vacuum leak can cause rough idling and unusual engine noises. Inspect the vacuum hoses and connections for any signs of damage, cracks, or loose connections.
- Throttle body and idle air control valve: The throttle body and idle air control valve are responsible for controlling the air intake and maintaining a stable idle. They may require cleaning or adjustment if they are dirty or malfunctioning.
- Mass airflow sensor (MAF): The MAF sensor measures the amount of air entering the engine. If it's dirty or faulty, it can affect engine performance. Consider cleaning or replacing the MAF sensor.
- Fuel auto system: Issues with the fuel system, such as clogged fuel injectors or a malfunctioning fuel pressure regulator, can cause rough idling. It might be worth considering a fuel system cleaning or having a professional inspect the fuel system components.
- Engine mounts: Worn or damaged engine mounts can lead to excessive engine vibration. Inspect the engine mounts for any signs of wear or damage.
