The IAC valve controls the amount of air that bypasses the throttle plate when the engine is idling. A faulty IAC valve can cause the engine to stall when you put it into gear or rev the engine.
2. Faulty Oxygen Sensor:
The oxygen sensor monitors the amount of oxygen in the exhaust gas and sends a signal to the engine control unit (ECU) to adjust the air-fuel mixture. A faulty oxygen sensor can cause the engine to run rich or lean, leading to stalling.
3. Throttle Position Sensor (TPS):
The TPS monitors the position of the throttle plate and sends a signal to the ECU to adjust the fuel injection and ignition timing. A faulty TPS can cause the engine to stall when you put it into gear or rev the engine.
4. Vacuum Leak:
A vacuum leak can cause the engine to run lean and stall. Check for any loose or cracked hoses in the vacuum system.
5. Fuel Pump:
A weak fuel pump can cause the engine to stall under load. Check the fuel pressure to ensure that it is within specifications.
6. Fuel Filter:
A clogged fuel filter can restrict fuel flow to the engine, causing it to stall. Replace the fuel filter if it is dirty or clogged.
7. Check Engine Light:
The check engine light can provide valuable information about the cause of the stalling problem. Retrieve the trouble codes from the ECU using an OBD-II scanner and research their meanings to identify the faulty component.
