The car just stalled by itself

Hello, when you say you try to jump it, are you saying there is no cranking of the engine without trying to jump it? If the engine is cranking but not starting, you have an engine performance problem that must be investigated. Ignition spark such as from spark plugs or coils, fuel delivery such as from a fuel pump or fuel injectors, air intake such as within the air box through the related sensors and control valves and emissions components can all play a potential part in the problem you are having. Without hands on testing, you cannot even begin to know where to start looking for the problem.