1. Faulty Ignition Switch:
* The ignition switch may be worn out or malfunctioning, causing a delay in turning off the engine.
* Solution: Inspect and replace the ignition switch if necessary.
2. Malfunctioning Engine Control Unit (ECU):
* The ECU might have software issues or internal circuit problems affecting engine shutdown.
* Solution: Have the ECU diagnosed and reprogrammed or replaced if needed.
3. Vacuum Leak:
* A vacuum leak can disrupt the engine's idle and cause vibrations.
* Solution: Inspect and repair any vacuum leaks.
4. Fuel System Issue:
* A clogged fuel filter or faulty fuel injector can affect engine performance and vibrations.
* Solution: Replace the fuel filter and verify the injectors (clean or replace as needed).
5. Motor Mounts:
* Worn out or damaged motor mounts can contribute to excessive vibrations.
* Solution: Inspect and replace deteriorated motor mounts.
6. Airflow Sensor:
* A defective airflow sensor can interfere with the engine's air-fuel mixture, leading to rough operation and vibrations.
* Solution: Diagnose and replace the airflow sensor if faulty.
7. Camshaft Position Sensor:
* A faulty camshaft position sensor can delay engine shutoff and cause vibrations.
* Solution: Test and replace the camshaft position sensor if it malfunctions.
Remember, this information is general in nature and the specific diagnosis and repair may vary depending on your vehicle's condition. It's recommended to have the vehicle evaluated by a qualified mechanic or take it to a trusted auto repair facility for accurate diagnostics and repair.
