1. Spark Plugs: Worn-out or faulty spark plugs can cause misfires, resulting in rough idling.
2. Ignition Coils: Malfunctioning ignition coils can disrupt the proper ignition process, leading to rough idling.
3. Vacuum Leaks: Leaks in the vacuum system can disrupt the air-fuel mixture, causing rough idling.
4. Idle Air Control (IAC) Valve: A faulty IAC valve can affect the engine's ability to maintain a steady idle, resulting in rough idling.
5. Throttle Body: A dirty or faulty throttle body can disrupt the air-fuel mixture, leading to rough idling.
6. Fuel Injectors: Clogged or faulty fuel injectors can affect the fuel delivery to the engine, causing rough idling.
7. Oxygen Sensors: Malfunctioning oxygen sensors can provide incorrect feedback to the engine's computer, leading to rough idling.
8. PCV (Positive Crankcase Ventilation) Valve: A faulty PCV valve can disrupt the proper ventilation of the engine, resulting in rough idling.
9. Engine Mounts: Worn-out engine mounts can cause excessive engine vibrations, which can contribute to rough idling.
10. Cam/Crank Position Sensors: Malfunctioning camshaft or crankshaft position sensors can disrupt the engine's timing, causing rough idling.
It's essential to have the vehicle diagnosed by a qualified mechanic to accurately identify the cause of rough idling and to perform the necessary repairs. Ignoring rough idling can lead to additional issues and potentially more expensive repairs.
