jj_the_mechanical_animal

In the last year, I've replaced my turbo assembly, timing chain, oil sending unit, passenger window motor, and had work done on my A/C relay. Now, my car will intermittently die whenever it feels like. Sometimes while I'm driving my car engine will die, while my electrical system is still up and running just fine. I've noticed my problems usually comes with driving the car for over fifteen minutes and turning the car off - this is where it seems to have the problem. If I allow the car to be off after using it for fifteen minutes or so, my car will not ignite...it tries but simply won't fire, only turn and turn and turn. After a couple of hours, the car will fire up just fine. I've had the car into 3 different Saab shops for a total of 3 weeks and they have no answer for me, and claim the car runs fine. I can't afford to pay them to search and find nothing any longer. Any ideas guys? I truly am desperate.