[s-cars] loss of power, engine shakes

[Konstantine Bogach]

Hi.
All of sudden UrS4 '93 lost power, engine shake whole care, barely could 
make 1 mile to home.   I hoped that a vacuum hose is slipped out.
No, they all in place.  This car is new to me but I played a lot with 
two 200tq '89  I own as well.   Is there anything I should look at 
first, more specific than "gas/spark" general approach?
Ok,  I did not pull codes yet.  I will do it tomorrow. 

Thank you
Konstantin Bogach.
S4 '93 MTM 3
200tq '89  QLCC 1.8 bar
200tqa '89 QLCC 1.8 bar