1. Vacuum Leak: A vacuum leak can cause a rough idle and shaking. Check for any loose or cracked hoses in the engine bay.
2. Faulty Spark Plugs: Worn or fouled spark plugs can cause misfires and rough idling. Check the condition of the spark plugs and replace them if necessary.
3. Dirty Throttle Body: A dirty throttle body can also cause a rough idle. Clean the throttle body using a throttle body cleaner according to the manufacturer's instructions.
4. Faulty Idle Air Control (IAC) Valve: The IAC valve controls the amount of air that enters the engine at idle. A faulty IAC valve can cause a rough idle and stalling.
5. Fuel Injector Issues: Clogged or dirty fuel injectors can disrupt proper fuel flow and cause rough idling. Consider professional cleaning or replacement if needed.
6. Mass Air Flow (MAF) Sensor Problems: A faulty MAF sensor can provide incorrect air intake measurements, affecting the air-fuel ratio and resulting in idle issues.
7. Engine Mounts: Worn or damaged engine mounts can allow excessive engine movement, leading to vibrations and shaking during idle.
8. Timing Belt or Chain Issues: Malfunctions related to the timing belt or chain can lead to incorrect valve timing, resulting in rough idling and shaking.
Recommendation:
If you're not comfortable diagnosing and fixing these issues yourself, it's best to take your vehicle to a qualified mechanic for proper inspection and repair.
