2001 Mazda Protege

After long drive, if car is turned off, it will not start again for about half hour. Engine turns over but does not start. Have to wait for half hour and then engine starts again. No check engine light trouble indication. Mazda dealership service unable to locate cause even using computer hookup. Anyone experience similar problem and have suggestion as to cause? Any help will be much appreciated.

Check for fuel and spark like the “civic starting daemon” post. Then, let us know the results.