Turbo on my 1992 Audi 100 s4 stopped working
 

Hi all I have an 1992 Audi 100 s4 turbo, the other week I was driving and the car was all sluggish no boost.

I had no noise before hand the car drives ok no smoke or anything apart from no boost.

When to the garage plugged it into the computer and it said that the MAP sensor needs replacing, so replaced that and no difference? looked and examined all the pipes and they look ok.

no other code comes up any ideas??

cheers manj