1. Vacuum Leaks:
- Check for any vacuum leaks in the engine compartment. A leak can cause a lean fuel mixture, resulting in a rough idle and stalling.
2. Faulty Idle Air Control (IAC) Valve:
- The IAC valve regulates the engine's idle speed by controlling airflow. A malfunctioning IAC valve can cause idle issues and stalling.
3. Clogged Fuel Filter:
- A clogged fuel filter can restrict fuel flow to the engine, leading to a rough idle and stalling.
4. Faulty Oxygen (O2) Sensor:
- A malfunctioning O2 sensor can provide incorrect information to the engine's computer, affecting the fuel mixture and causing idle problems.
5. Ignition System Issues:
- Check the spark plugs and ignition wires for proper functionality and replace them if needed. Faulty ignition components can lead to misfires and rough idling.
6. Dirty Throttle Body:
- Carbon buildup in the throttle body can affect airflow, causing idle problems. Cleaning the throttle body can often resolve the issue.
7. Engine Temperature Sensor:
- A faulty engine temperature sensor can provide incorrect information to the computer, leading to improper fuel and air mixtures, resulting in a rough idle.
8. Fuel Injectors:
- Clogged or malfunctioning fuel injectors can affect the fuel delivery to the engine, leading to idle problems and stalling.
9. Mass Airflow Sensor (MAF):
- A dirty or faulty MAF sensor can provide incorrect air measurement data to the computer, affecting the fuel mixture and causing rough idling and stalling.
10. Faulty EGR (Exhaust Gas Recirculation) Valve:
- A stuck or faulty EGR valve can introduce excessive exhaust gas into the air intake, causing idle issues and stalling.
If the problem persists or you are uncomfortable performing these checks and repairs, it's best to consult a professional mechanic or auto repair shop for proper diagnosis and repair.
