1. Check the ignition coil and spark plugs. If the ignition coil is faulty or the spark plugs are worn out, it can cause the engine to stall when cool.
2. Check the coolant temperature sensor. If the coolant temperature sensor is faulty, it can send incorrect signals to the engine control unit (ECU), which can cause the engine to shut off.
3. Check the fuel pressure regulator. If the fuel pressure regulator is faulty, it can cause the fuel pressure to drop when the engine is cool, which can also cause it to stall.
4. Check the throttle position sensor. If the throttle position sensor is faulty, it can send incorrect signals to the ECU, which can cause the engine to shut off.
5. Check the air intake system for leaks. If there is a leak in the air intake system, it can cause the engine to run lean and stall when cool.
If you are unable to find the problem yourself, you may need to take your vehicle to a qualified mechanic for further diagnosis and repair.
