If a common rail diesel turbo engine takes a long time to start only when its cold with white exhaust smoke and once started and warm there is no problem?

If a common rail diesel turbo engine struggles to start when cold and emits white exhaust smoke, it may indicate issues with fuel atomization or combustion at low temperatures. This could be due to weak glow plugs, low fuel pressure, or fuel injectors not functioning properly. Once the engine warms up, the improved combustion conditions may resolve these issues, leading to normal operation. It's advisable to check the glow plugs and fuel system for any faults.