Turbo is not working on my saab 9-3 td (2.2). what do you suggest? There is no smoke and the engine is running fine, just has a serious lack of power

you have a ring problem should not smoke at all

Blowing blue smoke is NOT an issue with the turbo, it is an issue with either piston rings or valve guides. You need an engine overhaul.

Did you check coolant level???

The turbo will not cause black smoke. White smoke, yes, if its passing oil into the engine, but not black.
First check that the air intake and filter is not blocked, check that the air hoses from the turbo and intercooler are not collapsing when given throttle.if thats ok, then get the injectors tested, if they are ok then you need to get the injection pump serviced. Black smoke is a result of overfuelling, either by the poor dispersal of fuel from the injectors or the pump, or blockage of air into the engine on the intake system.
Hope that helps

WHITE SMOKE MEANS ENGINE IS BURNING ANTIFREEZE.TURBO WILL SMOKE HEAVY BLUE WHEN TURBO SEAL FAIL.ALSO YOU WILL LOSE POWER.YOUR CAR IS TOO NEW.TO HAVE PROBLEMS.YOUR CAR SHOULD BE WARRANTY COVER.TAKE IT TO SAAB DEALERSHIP.LET THEM CHECK IT OUT.

Depending on the overall condition of the engine, it could have worn or frozen rings, worn valve guides or the turbo you installed is worn out. These are driven by exhaust pressure and if their bearings are worn, you may be getting a mix of compressed air from the turbo and oil that is seeping past the compressor's internal seals.

Sounds like you might have blown a ring on a piston. and the black smoke is oil being burned...find out what the engine code is....but a blown ring usually requires an engine rebuild to fix. Hope this helps.....sorry about the bad news

Take the car to Autozone, they will read the codes via OBD II for free.  Other parts stores may have the same policy ... call first.   My VW dealer charges $40 to pull the codes!!   I bought a low-end OBD II reader for $50, as the wife and I  both have VWs.

White smoke is usually antifreeze, the most frequent cause of this is head gasket blown or cracked head ... big bucks.  Hopefully this is not you.  Unless the car had a dramatic overheating incident, for most makes of cars, this should not happen until you have over 100K miles, probably closer to 200K.   
White smoke could also be break fluid sucked in from power brake booster.  If it's brake fluid, it will smell very bad.  
On cold days, when the car first starts, white smoke can just be normal condensation in the tailpipe ... if it happens after the car is warmed up ... it's something else.
Check your coolant overflow tank level ... if it's very low or empty ... put water in (don't bother with antifreeze yet in case you are burning it up in the engine).  
Good luck, ..ajm

One way to check for a blown head gasket, is to simply smell the coolant reservoir. Pop the cap, and see if it smells like raw gas. Every headgasket, I've diagnosed has had this smell, even if the oil is not contaminated. Another way is to hook up a coolant pressure tester, and run the vehicle for 15-20 mins or so. If the head gasket is blown, the pressure will exceed 15 psi. sometimes as high as 25 psi. If there is oil in the coolant overflow tank, the head is cracked, about 90% of the time.
I'm working on a 03 Saab 95 2.3l t. This vehicle smokes on initial start up, then the smoke disapates, and the vehicle is fine. Another mechanic diagnosed it as bad valve seals. I disconnected the pcv system, and the vehicle no longer smokes. If the valve seals have gone bad, the vehicle will smoke on acceleration. Also if the turbo seals are leaking it will smoke more heavily on acceleration.

Is there black smoke coming from the exhaust?