Audi gods demand sacrifice

[piotr@Exabyte.COM]

     Hi Everybody!
     I have been taking my Audi for granted, so the Audi Gods decided to 
     bring me down to earth.  My Audi, that has been trouble-free for years 
     now, (not counting broken radiator), had a change of heart.
     Starting today, it started running rough under load,  which can be 
     felt especially around 2500-3000 rpm when accelerator is depressed. It 
     feels like if one of the cylinders was misfiring/not enough fuel.
     The car is 86 5000TQ. Any words of advice, ideas, suggestions?
     
     Thank You
     Piotr
     
     PS
     If you could, please reply to me at polanows@colorado.edu.