4 hours of repair and $500 later ...

[Kent McLean]

Cat ^. .^ ~ wrote:
> The next few days my car is slightly better
> but still lugs at moving from a stop and
> also is still somewhat hard starting from
> cold.
> 
> But now when I am on the freeway I cannot
> seem to get it over 75 mph, when before I
> could go 100 mph without any problem.

What kind of car is this again?  IIRC, it's a 200 Turbo,
non-quattro, automatic.  If so, you should be able to
pull the diagnostic codes yourself:

<http://www.sjmautotechnik.com/trouble_shooting/10vtecu.htm>

The "test light" is nothing more than a $3 LED with resistor,
available at Radio Shack.

Other helpful pages are:
<http://www.sjmautotechnik.com/trouble_shooting/trouble.html>
<http://www.sjmautotechnik.com/trouble_shooting/boost.html>
<http://www.sjmautotechnik.com/trouble_shooting/vac.html>
<http://www.sjmautotechnik.com/trouble_shooting/nostart.html>

Back to your questions:

Hard starting could be a temperature sending giving a false
reading, which would fool the ECU into not providing a richer
mixture. Once warmed, the false reading matches the engine temp,
and the ECU gives the correct mixture.

No power could be, make that probably is, a vacuum leak(s).
Check all the rubber hoses, including the little ones and
the big ones (like the "Michelin Man" hose).

And find another mechanic.  Maybe a VW specialist, if you
can't find an Audi specialist.

--
Kent McLean
'94 100 S Avant, "Moody"
'89 200 TQ, "Bad Puppy" up in smoke
'56 Austin-Healey 100 BN2, for sale