Thanks for your reply but , the problem is solved .... I have been searching the cause and It was a silly thing.
I read the fault codes with the VagCom and this is what I found:
misteriusly I had the Hall connector unpluged...! Thats the reason why the motor stalls.
The second fault 00533 is the throttle potentiometer adaptation out of range , disconnecting the battery the ECU reset the old values and get ready for the adaptation.
The third fault 00513 is Engine Speed Sensor (G28) No Signal ,
this is normal on pre '95 models if you scan when the engine is not running
(I have an Vagcom unregistered version and I cant see all the DTCs meaning)
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