I have 2001 saab 93 se conv. I have a problem with my lovely car. I turn on the engine, it runs with no problem and than drive around 30 min. and stop the engine and try to run again it is not running. wait 15-20 minutes and try t again and it runs. It is also die by itself whenever i stop on the lights or stop sign. I have checked computer and there is no any code and check engine light is not on. Please help me what is the problem?