The reason why the old cheetah car can't start after the flameout.

Generally, the simple reason is that the throttle or idle motor is dirty, and it is easy to turn off the engine when the small opening is not adjusted smoothly when the car is hot, but it is not the case after the car is cold or the car temperature drops slightly. It can be solved by cleaning the throttle or idle motor.

Diesel vehicles use compression ignition, and the engine can only be started when the fuel pressure is high enough.

The fault cold start you described is normal.

It is difficult to warm up the car.

It may be caused by steam resistance inside the oil circuit.

I suggest you go to the repair shop to check the pressure of the fuel pump and whether there is oil leakage at each interface.

I hope your car will return to normal soon.