1. Idle Air Control Valve (IACV): The IACV is responsible for controlling the amount of air that enters the engine at idle. If the IACV is faulty or dirty, it can cause the engine to stall at idle. Check the IACV for proper functioning and clean it if necessary.
2. Fuel System: Check the fuel system for any issues that could cause a lack of fuel to the engine. This includes checking the fuel pump, fuel filter, and fuel lines for any clogs or restrictions. Also, make sure that the fuel pressure is within specifications.
3. Vacuum Leaks: Vacuum leaks can cause a lean air-fuel mixture, which can lead to stalling at idle. Check all vacuum lines and connections for any leaks or cracks.
4. Throttle Position Sensor (TPS): The TPS provides information to the engine control unit (ECU) about the position of the throttle valve. If the TPS is faulty, it can send incorrect signals to the ECU, which can cause stalling at idle.
5. O2 Sensor: The oxygen sensor provides feedback to the ECU about the air-fuel mixture in the exhaust. If the O2 sensor is faulty, it can send incorrect signals to the ECU, which can cause stalling at idle.
6. Crankshaft Position Sensor (CKP): The CKP sensor provides information to the ECU about the position of the crankshaft. If the CKP sensor is faulty, it can send incorrect signals to the ECU, which can cause stalling at idle.
If you are not sure how to check these components yourself, it's best to have your vehicle inspected by a qualified mechanic to identify the exact cause of the stalling and have it repaired accordingly.
