2001 Saab 9-5 Questions

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Sometimes the car will not start and a message appeared that "anti-theft device needs a service". I have tried both keys and eventually the key is recognised and the car will start
My 2001 Saab 9-5 Sedan (2.3L 4cyl Turbo 5M) recently took an uncommon road trip (80 miles). After making a quick pit stop, we restarted the car and the tailpipe began emitting a white smoke, which gradually thickened. About 5 minutes later, the smoke was incredibly dense and the car stopped accelerating. The engine wasn't overheating. We turned the car off and had it towed to a Ken Towery. The mechanic checked it out and quickly advised that the issue was likely onset by a broken part "catching" when the engine turned over and that we replace the motor. We then had the car towed back to our hometown...

Since then, I've tried to start it... the engine cranks, but it doesn't start. And, I've checked the motor oil... there doesn't appear to be any.

I had the car inspected on 8/18. Everything checked out OK, except for a loose oil cap (which they tightened). I had the oil changed on 6/16.

Any help diagnosing this issue would be greatly appreciated!
Left Saab service, drove a few miles, check engine light & (TCS 0ff) light came on, engine sounded ragged. no overheating or stall. Turned off recent repaired AC, sounded better, slight fuel smell. I stopped let car idle. Drove slowly home w/o a/c. check engine light still on, no overheating. I have not tried to stat the caragain.
Changed turbo recently, oil isn't milky, coolant a little brown, a lot of oil around the fuel injectors, was a lot of sludge in the engine flushed twice now, smoke comes and goes. When I drive it around for a bit it starts to smoke.
All dash lights come on. Car sputters and chugs. Will not accelerate. Just replaced battery 10/2013. Was running fine until it suddenly happened. No other warning signs or issues.
rattling just put a new idler pulley on a little over a year might have 100 miles on it and sat for a year started up first try with loud squealing coming from front of the motor sounds like when the last on went bad. Also a Very loud ticking/ knocking noise coming from timing chain area anyone else have this problem or have any suggestion s on where to start?
I think the water pump is bad, water not circulating.
Once I give it gas it dies it will not drive anywhere
i purchased a 2001 saab 9-5 turbo 2/12/13 drove for 3 1/2 weeks. passenger side of radiator blew never over heated.repaired under car back drove 1 day then rough and stumbling engine.told bad head gasket,creamy warranty company say i might have pay for repair.i did nothing wrong.did not drive after radiator incident. what should i do only drove this car for less than a month not even 600 miles.thinking of lemon law lawyer.
i was wondering if someone can help me resolve this issue i washed the motor on my saab know it has a misfire and the engine light comes on changed the spark plugs but it doing the same thing and was wondering if it could be the baccum hose cause the one it had was remended with black tape i replaced it but dont think its working so can any one help me asp thanks.
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