I've checked the injectors... No2 didn't work properly (it was leaking and it didn't "spray" the fuel) and the others were leaking and didn't look good. The other set were perfect. So i've put the other set in, the car started very good. The idle was about 1500 rpm, and the sound of the engine was very good. These were the good news...
The bad news: after ~30 sec of running, the engine stoped, VERY quickly!
It was just like when i turn off the ignition switch... no missfire or any change in the idle speed... after it has stopped, i can't start it, but after some minutes it starts fine again.
So, now i have totaly no idea...