What happens is that my Hyundai Atos 2001 1.1 vibrates the machine a bit when it is in nautral and parked and they have told me that it is because the machine is not on time (or point as some say) and then I would like to know how the machine can be refined or how it is done so that the engine is more even and does not vibrate ... in short, how does the machine get on time?
The engine vibrates because its supports are damaged, a spark plug is not working, bad synchronization or because it is not in time. In your case, the engine is Fuel Injection, there is no way to modify the ignition time (on time). Check the motor supports. But if your car, in addition to the vibration, lacks power then you should review the other elements you mention.