2003 Skoda Superb • 300,000 miles

When I starts up the engine, after 1 seconds, the engine stop, this happens when the water reach to 90 degrees after the water temperature going above 90 degrees will turn up really well. I changed the water pump, and I check the injectors, all injectors fit in the scale. Almost every sensor I check, but no solution. I had to 6 mechanical service, and a few electrical service. What can be wrong with my car. The chip in the key works well. If I turn the key to start engine and I keep it there to force the starts it will hear a noise, and after 5-6 seconds starts. I will appreciate if you will answer to this quickly.
August 21, 2012.