Idle speed ??????
 

So ...after a month playing with it 944 87 i come down to the last little problem to solve.
The car was running at 1200 RPM at idle when i got it .
The book says 840 +/- 40.
So last night I adjust the screw and is know idling between 850 and 950 rpm.
But ..there is a little vibration in the engine and i can fetl it at the steering wheel.
The car it will stay running ...and not gives the impresion that it will cut off.
What you think it may be the worn part so the car won't run smooth in the right idle rpm speed !!!!

Thank's guys

You have to jump accross two of the pins at the test plug next to the fuse/relay box to set the idle or you fight the emmission controls.

Or the whole thing could be fighting a vacuum leak.

Thank's SoCal.
I'll give a try.