at minimum regim the motor accelerate alone
 

Hi you hear good the moto accellerate alone without push the pedal i go at 2000 rpm and return at 1000 rpm continuament why???????????????????

When it is idling?

when you turn on the motor it start to accelerate intermittet to 2000 rpm

You either have a vacuum leak or a faulty sensor. The easiest way to find out is to plug the car into a Porsche scan tool and look for CEL codes or run the sensor tests.

It sounds like a temperature sensor or a throttle position sensor to me.