Why is my Toyota Coaster stalling after running for an hour and then restarting? I have to wait for the engine to cool down before it can run normally again. Does anyone know what might be causing this issue?

Replace the camshaft sensor.

This car has issues, just switch to another one.

There's an issue with the fuel pump. Just replace it, and it will be fine.

This situation is mainly due to the significant impact of high temperatures on related components. The most directly related factor is the fuel. High temperatures cause the fuel to evaporate quickly, which can affect the fuel pressure and create vapor lock, leading to difficulties in starting the engine.